Mr Cliché, I think the world would be a much lovelier place if everyone - including you - followed this idea:
That's true, but in return, those who follow a faith must divest themselves of the idea that their faith is more important than other people's beliefs or non beliefs. I think very few people have an objection to people following a faith. What they tend to object to is when that faith is used as a control method (i.e. historically most of the time) which depicts those who do not adhere to it as individuals who must be converted or punished.
Unfortunately that is *exactly* how religion works. And the more dogmatic and controlling the religion, the more extreme it tends to be (see Islam, Scientology, Christianity in the early days). That isn't to say that there isn't an equivalent to the C of E branch of Christianity in Islam, but that the perception is that if you draw pictures of Satan on a Christian church, aside from the vandalism charge, you are most likely to have caused sadness in the congregation and the vicar to say a prayer for your soul. Draw a picture of Mohammed on a mosque however and I suspect that the congregation may be less forgiving.
Religions do grow up, as their followers become more enlightened and more knowledgeable about the world, science and the politics behind religion. There will always be those who follow blindly and seem incapable of rational thought, but those are usually in the minority.