If we took the religious and homosexual aspect out of the debate, it’d be interesting to see how people feel about a lot of money coming from out of state that is targeted towards influencing another state’s proposition/elections.
On the out of state issue though, while I see your point, national advocacy groups are a fact of life. If you tried to regulate them, they'd simply function through subsidiaries on a state level. Which most have anyway.
Better it's in the open, and if the gays want to criticize the LSD or Catholic Church, fine. If they're over the top, we can criticize them (when we can get a word in edgewise), when they interrupt services or trespass they should be arrested. And however unpopular it might be, the Churchs involved should be involved in prosecution.