Are you sure it's atheists who are thin skinned, or is it theists being pushy?
Speaking of thin skinned, I had a theist storm out of my apartment a few months back, because I started trying to explain to him, that the Bible as we know it came into being, by a bunch of priests picking and choosing from scraps of parchment.
I hoped he cleaned up after himself ... the hail and brimstone. Also did his lightning fry your electronics?
Keep in mind, I was in my own home, and the guy keeps talking about God. I don't remember specifics anymore, but I responded, as you might expect, by saying that there is no God. He, of course pointed to the Bible as his authority, and I responded that the Bible is not the word of God. I start explaining about the origins of the New Testament, which gets him visibly flustered, and he tells me that God will punish me for saying things like that. I wish I could remember the entire conversation, but to make a short story shorter, he suddenly jumps up and storms out of the apartment.
The funny part though, is that his sudden exit revealed another Christian, my neighbor across the hall, standing outside my door, listening in on the whole thing! She had a rather embarrassed look on her face, of course, and retreated into her apartment.
I've since spoken to the guy a few times, but we never bring it up.
But I don't feel I was being inordinately "thin-skinned." I mean, if I can't express my opinions in my own home, then...