Guilt and shame at their own success.
I am reading the works of Josephus. It seems to go back long ago, when the Jews made peace with the Romans.
The Romans did not find the Jews unbearable and they were controllable by giving them things and security under their rule, as long as they did not go against Roman authority.
Many of the Rabbis were very cozy with the Roman Authority, and were given very Prestigious status. Don't rock the boat.
For those that did, well, they had to die. Easier for the Jews to go along to get along. Take the path of least resistance, and things have not changed very much.
Pray for Israel