Gedolei Yisroel ztv’l and shlitta have made it loud and clear, on the public record, that we in klal yisroel MUST vigorously oppose this abomination even as it pertains to state recognition of non-jewish activity. The slippery slope of immoral recognition has no end.
If anyone supports this lunacy is any shape matter or form, they must at the same time publicly support polygamous marriage (which is far less immoral than toeiva), marriage between a man and a monkey, etc. There is no legitimacy for supporting one abomination over another.