No, I'm not angry at god!

I'm pretty much a digital boy. I live a significant portion of my life online, as an active member of several online communities besides this one. Because of this, I put a great deal of effort into customizing my presence in those communities to reflect my personality and attitudes as much as possible. This includes my position as a naturalist, i.e. rejection of the supernatural.

Recently, on one of these communities, I received a personal message from another member, a Christian, who had some rather earnest questions about my philosophy. As always, I was only too happy to explain in detail, and a lengthy and completely pleasant discussion ensued. However, after five or six rounds of exchange, he abruptly sent back a rather terse message that boiled down to a single question, "Why are you atheists so angry at God?"

I was astonished. I've heard his question hundreds of times from fundamentalists and agitators, mostly those whose prose implies a marked lack of thinking skills, but I've never heard it from someone so apparently intelligent and rational. I analyzed the faulty logic and prejudice that the question implies, and sent it back to him, but never received any response. It's been weeks, and that same member seems to be ignoring both my private messages and public posts. I'm not upset, as we were not particularly friendly before this exchange, but this experience has made me reconsider the impact of this particular misconception on communication between naturalists and supernaturalists.

Have you seen me?Just to be clear, a naturalist can't possibly be angry at god, because it's impossible to be angry at something that doesn't exist. One might be angry at believers who've done them wrong, or angry at the foolishness of one's fellow man, but never at something they believe to be imaginary. It's exactly as ridiculous as saying that Christians are angry at Thor, since they don't believe in him, or that zoologists are angry at unicorns, since they don't believe in them. Being angry at or hating a god is an activity that by definition must only be possible for theists, and since belief is not a question of choice, the naturalist can't even be accused of *trying* to do so.

I'm at a loss. How do we as naturalists/freethinkers/non-believers make this point? Can we, in fact, make this point at all in such a way that believers will understand, or does the nature of their belief make them inherently incapable of comprehending it? Is this misunderstanding an inevitable consequence of the assumptions at the heart of supernatural belief systems?