He already came... "Kingdom is here now." to quote Jesus.
"The great sacrifice on the mountains of Israel."
Regarding Ezekiel 39:17 as
you claim "The great sacrifice on the mountains of Israel" as being the "crucifixion" - You are in error.
Let's take a look at what this actually says...
Ezekiel 39:17 And, thou son of man, thus saith the Lord GOD; Speak unto every feathered fowl, and to every beast of the field, Assemble yourselves, and come; gather yourselves on every side to my sacrifice that I do sacrifice for you, even a great sacrifice[H2077] upon the mountains of Israel, that ye may eat flesh, and drink blood.
The word here is not translated "crucifixion" - it is sacrifice[H2077]...
H2077
זֶבַח
zebach
zeh'-bakh
Strongs Definition:
From H2076; properly a slaughter, that is, the flesh of an animal; by implication a sacrifice (the victim or the act): - offer (-ing), sacrifice.
Total occurrences: 162
The verse further states,
"speak unto every feathered fowl, and to every beast of the field" - which must be understood of such fowls, and such beasts, as devour dead carcasses, a like invitation is given after the battle at Armageddon...
Revelation 19:17 And I saw an angel standing in the sun; and he cried with a loud voice, saying to all the fowls that fly in the midst of heaven, Come and gather yourselves together unto the supper of the great God;
The "great sacrifice upon the mountains of Israel" is where Gog's army will fall...
Ezekiel 39:4 Thou shalt fall upon the mountains of Israel, thou, and all thy bands, and the people that is with thee: I will give thee unto the ravenous birds of every sort, and to the beasts of the field to be devoured.
God Bless!