“69 weeks of years is a period of 483 years (69 x 7). 1535 AD + 483 years = 2018.”
Lots of interesting pieces of information here.
However, the Daniel 9 prophetic “sevens” were prophetic 7-year periods of 360 days each. This is why the earlier calculation turns out to be around 476 calendar years, even though it is 483 prophetic years.
In the Revelation 12 prophecy you mentioned, Israel is protected for 1260 days following the mid-week abomination of desolation. Three-and-a-half years equals 1260 only when using the 360 day prophetic calendar.
Also, in this same passage, the child represents Christ, not the church. Christ came through Israel. Satan tried to kill Him via Herod. After the resurrection He was caught up to the throne of God. The Church owes a great deal to Israel, but she was not born of Israel. The Church is of many nations.
The Jews killed their Messiah. If they want part of the blessings, they need to repent. They are not close to that from what I have seen.