religion intolerance

I might be intolerant towards some religions. I can't help it. A lot of people use their religion towards their advantage. They might say my religion doesn't allow them to act certain ways, but when they do something wrong, they'll say it isn't that their religion is wrong, it is just the individuals. Like for example, they can't eat certain food, but they can smoke and litter. I just don't understand how their religion works. I mean they got judgement for eating certain food, but it is ok to smoke and litter. Plus, littering is a lot worst than eating certain food. They are picky of their food because of religion, but they can litter because it is an individual choice... I don't think.. siding with religion when only in their favor is being faithful.