Yes. Google is getting sued lots but they are not suing anybody. I suppose selling (or giving??) a patent to HTC who then sues using it is sort of indirectly suing though.
And it's a pretty weird morality where protecting yourself makes you, as a whole, "evil."
Does Android/HTC infringe on some Apple patents? Maybe.
Does Apple infringe on some of these patents Google has given to HTC? Maybe.
Are the likely outcomes more favorable to Android/Google/HTC with Google having given HTC these patents? Almost certainly.
That said, I do not think their current actions are in any way evil or immoral. In fact I would lose faith in Android if they weren't doing this.
I suppose I assume that the lawyers justify their work somehow, because nobody wants to think that what they do is inherently bad. I think buying up patents specifically to sue people is bad, but I imagine if I worked in the legal field I would feel that it's only fair to fight back.