The Coming of the Son of Man

How do we see that this speaks of the current generation, not the end of time? Why wasn’t there anymore reason for the sacrifices to took place in the temple? What is message of the Gospel? Do the Scriptures talk about Christ’s second coming and how does it differ from this passage of Scripture speaking of the destruction of Jerusalem? What does it mean that God is longsuffering toward us? What was the abomination of desolation? What were the ‘iron teeth’ of the 4th beast symbolic of in Daniel 7?