For myself, I believe the destruction of Jerusalem occurred just as Jesus said it would and I believe the end of the world will also occur just as Jesus said.
Swiftly, completely, and unexpectedly.
2 Peter 3:9 "The Lord is not slow in keeping his promise, as some understand slowness. He is patient with you, not wanting anyone to perish, but everyone to come to repentance. But the day of the Lord will come like a thief. The heavens will disappear with a roar; the elements will be destroyed by fire, and the earth and everything in it will be laid bare. Since everything will be destroyed in this way, what kind of people ought you to be? You ought to live holy and godly lives."