Jews recognize converts as Jews in as good standing as ancient Jews. And despite your wish, there is no time limit on the right to return. Also, under Jewish law and Christian law, sons are not to be punished because of any sins of their fathers. Sins are judged by God, not humans. You are not able to make moral judgment because you are not God.
All people make moral judgements about issues all the time.
So don't lecture Jews or anyone else about morals. Descendents of Jews killed or forced from lands or had property taken by Nazis can still make claim for them just by being related to the deceased. This is universal law. As for the different opinions among Jewish scholars, there is an old joke that if you put 3 Jews in a room, you would have 5 different opinions. Just because one more Orthodox group may feel one way, that doesn't make it law or universal opinion.