I understand what you're saying, but it's not going to stop me from being generally and vocally anti-religion.

I'm someone whose brain is not wired for spiritual experience; I've never had one nor even wanted to have one. Because of this, for a long time, I didn't really understand the point of view of religious people. I took a course on the psychology of religious belief, in which we read (among other things) William James' The Varieties of Religious Experience. It's a seminal work in the field, and while the field has made quite a lot of progress since then (as Desrtopa points out below), it's still very informative. This helped me realize that others' brains were doing things that mine wasn't.

Nevertheless, religious claims are explanations for such experiences, and they're bad explanations. The popularity of those claims is harmful to rational pursuits. Decrying religion is about the claims and not the experiences, despite how many people seem unwilling to separate the two. For me, the falsity and harmfulness of the claims trumps the genuineness and significance of the experiences, if the latter is dependent on the former (but it doesn't seem in principle like it should be).