One of the arguments in the accommodation debate is that anti-accommodationist/new atheist stridency, forthrightness, or whatever it's termed harms the cause. It drives people away apparently. So the anti side ought not be so loud or not argue their case as a tactic. I think that's what it boils down to. This of course is an empirical question. It's not certain a priori that the anti side are a problem.
Anyway, apparently there is some data.
Jerry Coyne starts here.
Jason Rosenhouse add his bit here with more data. He askes where is the backlash that was predicted to follow the new atheists nastyness.
Josh Rosenau has a post* giving his opinion.
Of course PZ had to have his say.
*I posted the wrong link before. Thanks to verbose stoic for the correction.