To get away from _specific_ examples of tactless speech, let's talk about whether or not it's a good tactic to violently enflame your opposition.
pamsterdam, points out one view here. (I love comment links!)
I think it's a double standard. I can think of countless times when Santorum, DeLay, Frist, Bush, Cheney, Limbaugh, or
George Neumayr have engaged in 'tactless' commentary.
In some ways I agree with the divisive tactics of Rove: You don't need a third of the population to win elections, so don't pander to them.
(Aside 1): Just stating that Rove uses divisive tactics is, in itself, divisive.
(Aside 2): In some ways Bush does pander, he has to name things like "Clean Air" or "Energy Independence" even if that's not the results of those initiatives.