Check out the video from the MN ACLU here:
He wrote about it here:
And feel free to support Vote No! groups like the ACLU here:

I'm pretty impressed with Kluwe and Ravens linebacker Ayanbadejo for supporting gay rights. It wasn't that long ago that Reggie White, among others, were pretty hostile towards homosexuals. Esera Tuaolo, a former Viking defensive lineman, was afraid of being outed when he played here.