GNU isn't the only Free (not to mention free) philosophy in town. I believe it to be the only one whose licenses start out in a combative posture, e.g. "The licenses for most software and other practical works are designed to take away your freedom to share and change the works. By contrast,..." (Is this claim even true?)

I believe in Free Software and I also believe in positive, cooperative attitudes, which is not the attitude that GNU puts forth.