Buddhatree, i hope i'm not putting words in his mouth but it's my understanding that Dawkins intolerance only extends to religious pernicious beliefs. He has said numerously, that people can choose to believe whatever they like (despite the fact he may think they are incorrect beliefs) so long as they do not negatively affect the rights of others or cause harm. He takes issue with specific religions because of their specific pernicious beliefs either preached by the religious holy books outright and/or derived from its members interpretations of it's holy books. He doesn't despise all religious people, he despises specific religions based on some of their specific teachings. His animosity therefore applies to the specific religious people who hold and act on their specific pernicious beliefs and not because they hold any type of religious beliefs. He thinks it unwise to hold beliefs on faith but doesn't necessarily hold that against someone, completely depends on what that specific belief in faith is.
Then there's the side of Dawkins who actively challenges religions on the basis of their claims.
Might i add, atheism is not the negative claim that a concious god/gods of the universe does not or could not possibly exist, just the rejection of the positive claim that a/some god/gods exist based on insufficient evidence to justify the claim/belief that god/gods exist. However when people like dawkins argue against the existence of "man made" (for lack of a better word) religious claim of god/gods, he basis that on logical, reasoned and contradictory evidence that their claim has insufficient justification to believe to be true. There is evidence for the contrary and therefore deems there to be sufficiently good justification to hold the polar opposite/negative claim that their god/gods do not or likely do not exist.
No doubt Dawkins seems fanatical, however he has never said he is unwilling to see contradictory evidence to his rejection of the claim that some god exists. However unlikely he views that possibility, that door is never shut. I think he's very passionate about his beliefs but i think how passionate, fanatical or not someone is is an irrelevancy to the underlying truth of what someone says and believes.
I also think when Einstein said what he said, his interpretation of atheism was of those that fervently believe/claim that there is no possibility of a concious god/creator of the universe (the absolute negative claim).
Best video explanation on the topic ever.