The Mormon Church is an illegal PAC. They should be taxed, minimally.

I think so many of these churches should be taxed to be honest. I mean, the megachurches partake in politics and if you do that then you should lose whatever exemption you have in my opinion.

I'm having trouble finding stuff about this specifically but:

https://religionnews.com/2015/12/01/thank-you-ken-jennings-for-speaking-out-against-new-mormon-policies-on-same-sex-families/

The linked source is the Savage Love podcast with Dan Savage and it seems like he's been alongside the LGBT community but I understand what you mean with the tithing going to an organization like the Mormon Church.