Jesus in Matthew 24:15 and the parallel synoptic Gospels affirmed Daniel's description of the destruction of Jerusalem in Daniel 9:27 in 70 AD.
No they did not. That is jumping to conclusions. Since Jesus Christ is the Prince confirming the Covenant in Daniel 9:27, where did Jesus affirm He was the army that destroyed Jerusalem and the temple in 70AD? Not even history can back up that claim. Jesus did not approach Jerusalem with an army and completely destroy the temple and city. That was not even prophecied in Daniel 9:26. Jesus' own people destroyed the temple, not Jesus Himself.
Daniel 9:27 is not even about destruction. It is about the removal of the Holy Spirit from the earth. It is where Satan is allowed total, that is 100%, control of the earth. It is abomination and desolation, not the end of some buildings.
The very act of salvation is chopping one's head off. How many churches today would last very long if the only way to be a member is having one's head chopped off? That would be considered an abomination and desolation. In fact no one would be alive after joining. That is the whole point. Physical death is the only way to escape this desolation. There is no enduring until the end. Only the ability of cutting off the head to prevent the mark of the beast. It is one or the other. Not some in between state.
Daniel 9:27 is still future, because no such desolation has been necessary.
Yes Jesus said the buildings of the temple would be destroyed. No, Jesus did not say when, in any verse we can read today. Yes it happened in 70AD. If you want to call what was said at the temple the OD, that is one's weird opinion. Jesus did not say anything about destruction in the words attributed to the discussion on the mount itself.
In fact Jesus did not give any time frames besides a generation. Jesus gave many more events besides buildings being destroyed. But you seem to be claiming a single event in 70AD to be the sole fulfillment of every prophecy in Scripture.