Why do muslims have difficulty in accepting that 'god' is not exclusive only to 'Muslims' ? ?

All religions are like that not just Muslims, Christians will see you as a non-believer and try to 'rescue you from hell' dont just think that Muslims are like that it unfair. Im an Atheist so i dont really get why all of you are so high-strung on religion it all sounds like a load of crap to me