I think most fit this category.
I think a few really do not believe in God and do not like the idead of society pushing what they consider a lie on others. They would be more believable if they also fight to stop other actual lies like global warming and speak out about stealth muslim jihad by immigration in their countries, and stuff like that. But I believe this percentage of atheists is very, very, very low.
Real Atheists just laugh at any and all religions unless and until required to behave according to the dictates of any of them. To a genuine Atheist there is no difference between belief systems, only in the level of coercion.