I disagree to some extent. He's always been some kind of a douche, but he did have radically different views on the subject of censorship.A common misconception with Steve Shives is that he had sanity once. It is my contention that this is not the case. A lot like many former members of Channel Awesome, and assholes like Dobson and Moviebob, Shives was always like this, and it's my belief that he was always seeking the proper environment to thrive in.
If you go back to his content taking on Christian loons, you will see that his discussion of them carries with it a hefty dose of moral superiority. He often attacked religion itself, on the grounds that inherently wasn't backed by facts, but always with an aura of insufferable smugness to it. When Social Justice came around, Steve latched onto it willingly because it gave him an excuse to feel morally superior to basically everyone. He made that decision willingly, and without a shred of hesitation.
You look at his old videos on this subject, he really doesn't come across the same person as he is now. Hence why the theory surrounding his wife has so much credibility.