How is he acting like a heel and being cheered for it? I don't think that's the case at all.
When Truth was going to return, there was no way he wasn't going to beat the crap out of Miz for what Miz did to him. That's just something that was logical to do and quite obvious as well. As for this week's Raw, all Truth did was follow Miz around and continue playing mind games with him, which instantly reminded me of when Edge did a similar thing to Kane over the World Heavyweight Championship near the end of 2010. Nobody thought Edge was being a heel by doing what he did, and in this case Truth isn't either. His character is supposed to be this wierd, delusional guy, who at the moment is getting some revenge on somebody who took him out. Things like that happen all the time in the WWE.
I have to admit, I didn't think he was convincing enough on his return as he looked like the exact same R-Truth. The crowd's reaction was mixed too as they didn't know whether he was doing a good or bad thing, but this week he was easily over as a face and I look forward to seeing what he does in the future. I fucking laughed hard when he started quacking like a duck!