I thought that what you meant was 70 AD was a signal that the dynamics concerning the Old Covenant had changed.Usually dispensationalists say that 1948 was the point of change.
After a generation's grace period after Christ's resurrection and ascention, A.D. 70 was the unquestionable end of the Old (Mosaic) Covenant typological cultic order. No temple to go to, no sacrifices, priesthood scattered or dead.
"In speaking of a new covenant, he makes the first one obsolete. And what is becoming obsolete and growing old is ready to vanish away. "
It's bothersome, that some Christians want it back.
I read in an article recently that it's the resurrection of Old Testament - 1st Century Jewish legalism being re-created in the Church.
Weird.