Everything Jesus said after Matt. 24:3 was primarily about the time preceding His return. In verse 3, the disciples asked Jesus about the signs that would herald the end of the age. The Olivet Prophecy was not primarily fulfilled in 70 A.D. because Jesus clearly did not return in 70 A.D..
You are also misusing Jhn. 5:43 because Jesus was not talking about charlatans trying to pass themselves off as the Messiah:
Hello brother, I understand everyone wants to point unto Matthew 24:4-14 as the times just before Jesus returns and many even use this as just before his second coming because they do not understand the pre trib Rapture, so it gets double bent out of shape in that case and all of the sudden "these verse" are a part the 70th week events (not really). However its not that, its the 70 AD Event in verses 4-6 (I can prove it via using logic and the scriptures) and verses 7-14 are about the Church Age in general, but more specifically it is about the Disciples, in Matt. 24 Jesus gave the disciples every key they needed to overcome what they would eventually have to face. Bear with me here and I will point this all out.
So, Jesus is pointing to the temple that would soon be torn down, the disciples then ask him specifically, when will these things be? (Temples destruction) AND what is the sign of your coming AND the end of the world [age of man].
Jesus first warns them about the 70 AD events, and if we pay close attention we can see THREE TIME PERIODS via the three false christs/false prophet answers of Jesus, and we can also see in verses 6 and 14 what Jesus is referring as THE END.
Matt. 24:4 And Jesus answered and said unto them,
Take heed that no man deceive you .
(Disciples) 5 For many shall come
in my name, saying, I am Christ; and shall deceive many.
6 And
ye (Disciples) shall hear of wars and rumours of wars: see that
ye be not troubled: for all these things must come to pass,
but the end is not yet. (Or as Luke says is by and by.)
So, Jesus answers their first question first, when shall these things be, well, Jesus was telling them about the temples coming destruction, the disciples added in AND your coming AND the end of the world. So, Jesus answers the temple question here by giving them invaluable information that will no doubt save there lives. He tells them what all has to happen BEFORE the end (70th week) can come. But here, he tells them......YE (DISCIPLES), let no on e deceive you, many shall come saying I am the christ (like I stated, this was 70 AD) and they will deceive many ?(the Pharisees etc.) and YE (DISCIPLES) will hear of wars and rumors of wars (65-70 AD events) but DO NOT BE TROUBLED (key coming up here), all this must happen (temples destruction) BUT the end is not yet and he then tells them what brings THE END in verse 14 whereas they had a foolproof understanding !! Amen.
So, this was indeed about the 70 AD events, Jesus did not want them reading Zechariah 14 and rushing back every time they heard that a new messianic figure had shown up. That could have gotten them killed, and Jesus had a church to build elsewhere !! So, in verse 14 (skipping ahead to tie it up) Jesus tells then what will bring THE END, he said when the Gospel is preached unto ALL THE WORLD, then the end (70th week) will come. So, the Disciples had no worries, they knew until China, India and even the Northern Tribes (Scythians) were preached unto via the Gospel, Jesus was not coming, in fact in the next few verses Jesus yells them they will all die save John (we know he told them this elsewhere, but in verses 7-14 he tells them what they needed to do). The disciples had question why John was nit going to die a Martyr elsewhere.
Matt. 24:7-14 is in general the Church Age, but its more or less basically a survival instruction guide for the Disciples at least dodging the pre 70 AD events, then he warns them how they will die so they are ready for it, and do not turn into another Judas. All one has to do is pay close attention and they can see its aimed at the Disciples.
Nation (Ethnos) will rise against nation, kingdom vs. kingdom, famines, earthquakes and pestilences in varied places, these are the beginning of sorrows (birth pangs)....which point towards Jesus; coming when they begin tm become more frequent in nature. (panoramic view of the Church Age) Now Jesus goes back to the focused view about his Disciples. He tells them their fate in so many words.
Matt. 24:9 Then shall
they deliver you up to be afflicted, and
shall kill you: and
ye shall be hated of all nations for my name's sake. 10 And then shall many be offended, and shall betray one another, and shall hate one another. 11 And
many false prophets shall rise, and shall deceive many.
{{ The disciples were more than likely killed for leading away people from these false gods like Jupiter, Zeus (same god) and Jesus was foretelling them their fate so they would understand what they were going to face. If they were not willing to die for Jesus' name and cause they would have stopped at that time !! These false prophets are DIFFERENT from the false christs in verse 5, one is the 70 AD events, the other one here is the Church Age Events.
}}
12 And because iniquity shall abound, the
love of many shall wax cold (Those who kill you are weak heartless cowards in other words). 13 But
he (DISCIPLES) that
shall endure unto the end, the same shall be saved. 14 And
this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
Paul said the race is a Marathon race, not a sprint, this has nothing to do with people enduring the
End Time Troubles, its about enduring unto the end of ones life as a good and faithful servant.
John 5:43 was spoken unto the Pharisees, so who else could have REJECTED Jesus and then ACCEPTED another? As we see, the 70th week is first seen in verse 15, and runs through verse 31, we see THE Anti-Christ and False Prophet in verse 24. So, the 70 AD event had the false christs, the Church Age portion had the false prophet types and the 70th week portion had the Anti Christ and False Prophet in it.
So, nothing from verses 4-14 are about the time just before he returns to rapture us, as a matter of fact that is in verses 36-51. It is mostly, TBH, just a HOW TO lecture fir the Disciples to understand how they are to void early deaths and how to understand tat one day each one of them will have to pay the ultimate price for building the Church of Jesus Christ. Glory to God, they were good and faithful servants. Amen.