The Bible says Israel has 70 weeks to get right with God and acknowledge Jesus as their Messiah,with each day being one year.69 weeks have passed with the last week to be a future time,and the purpose of the last week is to bring Israel to the truth that Jesus is their Messiah,and cause all people that do not love God to follow the beast kingdom and take the mark.
Which means God is giving the world 7 years to have their way and cause all people that do not love Him to take the mark,which the prince to come,the man of sin,will establish a covenant for 7 years that will cause peace in the Middle East,which is probably between Israel and the Palistinians,and because of that they will think that this man is great,and he will be a man that will appear a man of peace,and after three and one half years,he will step in to the Jewish temple and claim to be their Messiah and God.
Jerusalem will probably be split in to 2 sections one for the Jews,and one for the Palestinians,which makes the scriptures that God is going to gather all nations together against Jerusalem,and when they overrun half the city,then the other half will be saved,which sounds like they will overrun the half of the Palestinians,and when they get to the Jews half they will be stopped,making those scriptures sound right.
God also talks about the Palestinians messing with the Jews at the end time in which God said He is going to put it back on their own head,in the book of Joel chapter 3.
When that peace treaty is signed for 7 years with Israel then when it goes in to effect,that will be the start of the tribulation,and whoever causes it to happen would have to be the man of sin,who will work for the first three and one half years being a great peace maker,and in the middle of the tribulation will claim to have received godlike power through nature.
But first there has to be talk about the world split in to 10 sections with a leader in each section that will rule for the first three and one half years,and the man of sin will rule for the last three and one half years.
As far as the tribulation,the Bible says it will not happen until the man of sin steps in to the Jewish temple and claims to be God,and makes war against the saints,so the sainst will be in the tribulation.