<pedant> According to the Great Infallible Wikipedia, "The term Zealot, in Hebrew kanai … means one who is zealous on behalf of God". So technically RD isn't a zealot ;) </pedant>
But seriously, I don't agree with Talkemada's point. I'm not sure how you can equate Dawkins' followers with 'believers in fairy stories'; those of us who agree with RD do so on the basis of his reasoned arguments, not some blind faith.
Also, I'd like to see some evidence that religious people are happier than atheists, as you imply. I'm happy. I don't feel I need to do good or end up burning in hell. I do good because I want to – somewhat more altruistic than a fear of the nasty things that will happen to me if I don't.
I can see how RD does annoy people – his militant atheism doesn't naturally sit well with me – but how many of his critics have actually read his books? The God Delusion is a masterclass in logic and reason and he explains his position well. I suggest you read it, after which we can have a rather better informed debate.