Fred Phelps believes God should “bring judgment on America” because we’re tolerant of homosexuality. That’s exactly what was suggested here. What’s the problem?
You may not like the way he expresses his beliefs, but you share similar beliefs all the same.
So...if two people both believe abortion is wrong, and one tells women they should let their child live, and offers help, and another calls the women filthy whores who got pregnant at an orgy, you think those people are basically the same? I don't. And that's assuming Phelps really believes the bilge he spouts, which is really, really unlikely.
Why is it you call yourself a traditionalist if you don't believe what the Bible says about nations that endorse sinful behavior? What tradition are you following? After all, most people who call themselves traditionalists are Jews or Christians. And if you aren't religious but embrace traditional morality, why wouldn't you figure homosexual marriage could cause major destruction?