The extent to which I object to any religious belief is more or less commensurate with the level to which it informs one’s daily life. If you privately believe that the universe is 20 minutes away from being devoured in a ball of flame, but you still do a good job filing my tax returns, it’s really not my place to get all hot and bothered by your delusion. This isn’t to say that, if given the opportunity, I won’t say something about how ridiculous your beliefs are. After all, the truth is important. However, it simply doesn’t interest me to put my shoulders into exposing the irrationality of your particular faith. After all, provided you make no (or comparatively few) life decisions based on it, it’s a bit arch of me to go after it.
Islam, at least insofar as I understand it (and have seen it practiced) is one of those faiths wherein daily observance and connection to day-to-day life is much more persistent. Christianity, by comparison, has fewer daily rituals and practices that mark someone as “a Christian”. There is no dress code, there are no dietary restrictions, few necessary public observances. It is far easier to be a “stealth Christian” than it is to be a “stealth Muslim”. Couple that with daily prayers and the phrase “inshallah” (which one of the guys I work with uses – to be sure, one branch of my family doesn’t talk about the future without saying “God willing”, so that kind of obeisance is not exclusively Muslim), and you get a religion that is very much a ‘live in’ one.
Perhaps the most visible signifier of Muslim belief is the head covering that many Muslim women wear (either by choice or by coercion). I’ve known sisters, both who would describe themselves as ‘observant’ – one wore the head scarf, the other did not. It was very much a choice for them, and I have no quarrel with that. The only thing that weirds me out about the whole practice is the fact that it is an open, visible sign to everyone around you that you subscribe to the belief that women ought to cover their hair for ‘modesty’ purposes. I would be, I imagine, similarly put off by a Catholic woman who wore a wimple or a Hindu woman displaying a bindi (although the bindi is often cosmetic rather than religious).