Why ban wikipedia?
You just answered your own question.
I read Card's non-fiction editorial stuff quite a bit, not because I agree, mind you. Whatever else Card is, he's committed to democracy. He thinks it's panacea and utopia and rainbows and bunny rabbits. He's completely opposed to any kind of protest against government authority. This comes up repeatedly in his writing. You take one quote, misinterpret it wildly, and come out screaming about "violently overthrowing the government" when his stated stance is support of the political process that exists.
He's an asshat. He's always been an asshat. He ignores much history and engages in Mormon apologia and hates "the terrorists." You had to pick one (inaccurate!) sticking point about gay marriage as your reason not to read his books?
He's dead, Jim.