Note that this needs to be punished more harshly than Nazi Germany because once you get rid of the land taken as illegal occupiers, there is no land left for the Israelis, whereas I believe Germans had been in Germany long enough to justify some generational claim of a country.
So people shouldn't be able to stay in Israel, but they also shouldn't be able to move freely throughout other countries (except certain individuals after proving enough separation from the overall democracy of the group).
It's hugely important that courtroom people recognize this shit and use the most peaceful means to control this population (imprisonment instead of death)