I find it odd that when filling out a form that asked me what my religion is one of the choices is Atheist.
What now? That is the that opposite of religion.
I don’t think there is anything “militant atheist” in the post you replied to.
I also consider myself a secular humanist, but would never describe myself as religious.
I think that normalising not having a religion would help to bring tolerance for people who have differing opinions, while calling secular humanist a religious view may reinforce a bias in some people that “you can’t be good without religion”.