I'm sure that Muslims sincerely want to convert Jews and Christians to their belief system. Certainly, Muhammad first tried to convert the Jews before he hated them.
So did Martin Luther.
The Spanish Inquisition was not against Jews. It was against Jews (and Muslims) who were coerced into accepting Christianity but were believed to be insincere Christians. I think that the Catholic Church at the time of the Spanish Inquisition also sincerely held its convictions.
In fact, throughout the centuries of persecution of Jews, it is only under the Nazis that Jews were not permitted to save themselves by converting to the faith of those who were bothering them.
At a time when the Jewish people is rebuilding, when the memory of the Holocaust is still fresh in the mind of at least the older Jews still alive in this world, it is a display of brazen contempt against the Jews to move to Israel and lure Jews away from their faith while they are trying to do no more than live their own lives in peace.
As far as I am concerned, both Christian missionaries in Israel and the International Solidarity Movement both are trying to destroy the Jewish People. The Christian missionaries do this by causing them to be culturally and religiously alienated from their own people, and the ISM does it by more violent means. No doubt, more Jews have been lost to the Jewish people through the efforts of Christian missionaries.
I certainly did not defend any violent or coercive forms of proselytizing by any religion, but that's not what this JAMM group is doing. Any religious Jewish parent who cares about raising their children in the Jewish faith would do well not to let their 15 year olds run around a big city unsupervised. There are plenty of non-religious challenges to Jewish faith which are just as readily available as these missionary outfits. I suspect a lot more Jewish young people in Israel are abandoning the religion they were raised in for secularism, than for another religion.