The 70 weeks apply to the Jews because they have 70 weeks to get in the truth,and acknowledge Jesus as their Messiah,and this only applies to the nation of Israel(Daniel 9:24-27;Daniel 8:9-12;Daniel 11:31-35;2 Thessalonians 2:1-13;Matthew 24:15-24),for God has the plan to restore the kingdom on earth to the nation of Israel(Acts 1:6-11:Ezekiel 39:23-29;Zechariah 14),and said that He will make a full end of all Gentile nations,but will not make a full end of Israel(Jeremiah 46:27-28).
The Bible says Israel is blinded in part,until the fulness of the Gentiles be come in,and so all Israel shall be saved(Romans 11:25-29).
Israel acknowledges the Old Testament,but not the New,for the majority of them,and when salvation is no longer available to the Gentiles,God will send Israel 2 witnesses to turn them to the truth,and the kingdom on earth shall be restored to Israel,and Jesus and the saints will rule over the people that God spared at the battle of Armageddon.
The 70th week has not happened yet,for Israel is still blinded in part,and the Gentiles still have salvation available to them.
God said He will gather all of Jacob,the whole house of Jacob back to their land,and restore the kingdom to them,and He will never hide His face from them again,and they will know the LORD from that day and forward.
If this were in the past Israel as a nation would of been in the truth from that day,and forever,but we see they are not in the truth.
The man of sin will establish peace in the Middle East,and it will pave the way for all Jews to go back to Israel,which God said He will leave none of the Jews in the nations,and the Jews and the Gentiles will be separated.
The Jews will split Jerusalem with the Palestinians,and rebuild their temple with no hassle from the Palestinians.
The Gentile nations will come together,and say,Peace and safety,and will try to establish peace on earth(1 Thessalonians 5:1-6).
For three and one half years the world still has salvation available to them,and they will operate by a ten horn kingdom,the world split in to ten sections with a leader in each section(Daniel 7:7-8,23-27),and a unified religious system,based on the new age movement(1 Timothy 4:1-5,2 Timothy 4:2-4),spiritual evolution through nature,and all religions interpreted as such,and it will be a hate crime punishable in the international criminal court system,for all are valid,and Christianity will rapidly decline in impacting the world with the truth.
The religion of Islam rebels against the operation of the ten horn kingdom,and the unified religious system,and war breaks out between them,and one third of the population of the world perishes,and three sections of the world,the Arab nations are plucked up by the roots,nuclear weapons(Daniel 7:7-8;Revelation 9:13-21).
The ten horn kingdom failed at obtaining peace on earth,and after the 6th trumpet the world does not repent of their sins,and does not turn to God,but keeps trying to solve their problems on earth,so God gives the world the man of sin,the beast,to rule over them(Daniel 7:23-25;2 Thessalonians 2:1-13;Revelation 13:1-10).
War breaks out in heaven,and the devils are cast to earth(Revelation 12:7-17),and the earth becomes the habitation of devils(Revelation 18:1-3;2 Thessalonians 2:7-12),and they will deceive all people who do not love God,and they will follow the beast kingdom.
The man of sin will step in to the Jews temple,and claim to be God,and their Messiah,and will convince the world that he harnessed the power of nature,and evolved,and will share this power with all who follow him.
Then the beast and the world will persecute saints(Daniel 7:25;Daniel 8:23-25;Daniel 12:7;Revelation 13:7-10),and at the end of the last three and one half years those that remain will be gathered unto Christ,and the beast and the world attack Jerusalem,the Jews,and God comes back with the saints,and defeats the world,and saves Israel.
Israel is protected from physical attack during the 7 years period(Revelation 12:6;13-16),for God has the plan to bring her to the truth,and restore the kingdom on earth to her.
The 70 weeks apply to Israel,that they have to come to the truth as a nation,and is the time that God causes all people that do not love Him to follow the beast kingdom,so He can end this sin business on earth,and brings Israel to the truth.
If the 70 weeks happened in the first century Israel as a nation would of been in the truth from that point,and forward,and the Gentiles would not have salvation available to them after that point,and there would of been no operating Gentile government,and nation,after that point.
Eze 39:25 Therefore thus saith the Lord GOD; Now will I bring again the captivity of Jacob, and have mercy upon the whole house of Israel, and will be jealous for my holy name;
Eze 39:26 After that they have borne their shame, and all their trespasses whereby they have trespassed against me, when they dwelt safely in their land, and none made them afraid.
Eze 39:27 When I have brought them again from the people, and gathered them out of their enemies' lands, and am sanctified in them in the sight of many nations;
Eze 39:28 Then shall they know that I am the LORD their God, which caused them to be led into captivity among the heathen: but I have gathered them unto their own land, and have left none of them any more there.
Eze 39:29 Neither will I hide my face any more from them: for I have poured out my spirit upon the house of Israel, saith the Lord GOD.
This has to be a future event,and when it happens,then Israel will always be in the truth from that point,and forward.
But we see that Israel as a nation is not in the truth,so there is prophesy to go,and not all prophesy fulfilled in the first century.
The book of Revelation is a warning to the world to get right with God,before He puts an end to this sin business on earth,and salvation is no longer available to the Gentiles.