"The destruction of the Jerusalem temple and the cessation of the sacrificial worship in AD 70 made little difference to Jewish life in the dispersion."
The destruction in the vision in Revelation makes a big difference to Jewish life.
Only in Jerusalem. The effect would be negligible on Jews living in the diaspora. The only thing that would be affected is annual pilgrimage to Jerusalem for the various festivals. Revelation, like Matt. 24, was directed primarily against the Jews living in Jerusalem.