Religious "moderates" and atheists

[Mudhammam]

And if you play that game, you should realize they can play it too, i.e Stalin. And if your response is just that Stalin's actions had nothing to do with atheism itself, then you're doing the exact same thing as you criticize religious moderates for doing: exempting yourself of responsibility of actions done by those of the same ideology by saying that there actions had nothing to do with the ideology itself, but peripheral concerns.

Atheism =/= Stalinism

Atheists have no trouble condemning barbaric secular ideologies because atheism isn't commited to anything expect rational argument and evidence. If moderates can say the same about extremists in their faith, why don't we see ourselves in the same fight? Is this happening and the moderate is just too fringe to be noticed or have more of an impact?