Pretty offensive.
What you said implies "My way of thinking is superior and those that think otherwise are not entitled to their thoughts and beliefs."
To be honest, if religion never happened, people wouldn't be having constant wars over who's god is right, not to mention the "Dark Ages" would (most likely) have never happened, also not to mention what would have happened at The Crusades. (Though, to a much lesser extent than the former.) (I don't know if capitalizing it is right or not, but I did.)
However, on the flip side, this would mean that many other marvelous inventions (seriously, look up the funky stuff the Roman's did at their temples, with all the machinery, it was brilliant.) and many wonderful artistic pieces, (eg: Sistine Chapel, etc.) would never have come to be.
tl;dr: This could go either way.
