Maybe we should demand polygamy be legalized?
Polygamy is mutar according to halacha.
I know some chochom will bring up the Cherem D'Rabbeinu Gershom,well that was for only 1000 years & that 1000 years is way over making it non-operative today.
It never effected Sephardim/Eidot HaMizrach.
Only reason we don't do it is because it is illegal in all western countries.
It should be legal partcularly in Israel if just to answer the demographic problem.
Both Rabbi David Bar-Hayim of Machon Shilo & Rabbi Dov Stein of the reconstituted Sanhedrin concur & hold it should be legal.
I homo marriage which is asur is legal than so should polygamy which is mutar.
While I see your point, there in lies a problem. It's not so much the problem of people looking down at it. It's other people who are perverted who would use polygamy the wrong and perverted way...and who knows? Can lead to bisexual polygamy of orgies.
If something as sensitive as polygamy were to become legal, then certain punishments regarding sexual immorality should exist too. And here in lies another problem. Our society today is not ready for either polygamy nor punishment for sexual immorality.
My advice would be to choose your battles wisely. Institute Kahanist style anti-homosexual and a Pro Torah agenda to begin moving people away from sin. After that bring them towards holiness. After holiness then polygamy can be understood and practiced appropriately.