If the Israeli government decided to legalize polygamy, how would the rabbinical establishment react? Would they allow it religiously or not? If not, on what grounds, given that the Torah allows it?
Rabbenu Gershom forbade it for Ashkenazim more than 1000 years ago, but his ban has expired. Sephardim never forbade it, although they seldom practiced it. (Having grown up in Egypt, I never heard of a single case.) I know that a few Moroccans or Yemenites came to Israel in the 50s with more than one wife, and Israel "grandfathered" them, but it never allowed multiple weddings to take place on its territory.