If you're talking about the same group I'm thinking of, it's members of the Westboro Baptist Church in Kansas and/or their supporters. They go to the funerals of soldiers with anti-gay banners and signs; their feeling is that soldiers are dying because God is angry with America for its "acceptance" of homosexuality and general lack of morals. Apparently, they also protest at the funerals of those who've died of AIDS.
I don't know that there are words to describe how disgusting this type of behavior is, or how insane their so-called logic is for disturbing grieving families and friends of the deceased. Free speech is all well and good, but there's something to be said for knowing when to keep your mouth shut. And I agree, if these people want to criminalize homosexuality so badly, they should take it up with the policymakers in D.C.