Well, let's look at the two sides to see which one is disrespectful.
On the one hand, we have theists. They've passed laws preventing atheists from holding office in the United States, passed laws forbidding people to engage in activities that violate their religious beliefs (Blue Laws), are attempting to force their way into science classes in order to create a theocracy (the Wedge Document), establish noncheritable organizations known to harbor people who rape children and which don't pay taxes, and (and this is a big one) murder innocent people.
On the other hand, you have atheists who rent billboards, hold conferences, write books, write blogs, and argue online. Oh, and strive for the same civil liberties as everyone else has (you know, the right to hold office, the right to not be assaulted, the right to not have our homes violated, that kind of thing).
I think you need to reconsider telling atheists we need to be more respectful.