I don't think anyone has ever been thinking of Richard Dawkins when they've put Jedi down as their religion. I'm sure that they're doing it as a middle finger to the Church.
If so, it's poorly aimed. I think the Church would be aware of the fact that there are people who hold to a different set of beliefs the contradict with theirs. Lot's of Christians die every week because of the simple fact that there are people who disagree with them.
From their perspective Jedism is just another crazy, discredited belief. Just like you, and the supposed Jedi's, Christians think that all such beliefs are wrong - expect their own. Why is Jedism an insult to Christianity but not yours? Because yours are right?