I think polygamy shouldn't be illegal
What does polygamy being legal means?
It means I think it shouldn't be illegal to marry many wives as possible
Supporting polygamy is a personal opinion and it is acceptable in several cultures. Regardless of your opinion, you actions should be determined by what is currently legal.
Well in my culture polygamy is legal and it should be in other cultures too.
Unfortunately, you don't get to decide what is legal. maybe you can run for office or join an advocacy group to try and make it legal.