Yes I am serious.

You do the right thing to explain that you are different from the bad Muslims. But that's your job to do that.

It's not someone else's duty to assume a stranger is peace-loving. And westerners have heard a lot of this before. "Oh, I am sunni, it is those Shiites who are the bad guys." And the other way around.

I might point out that a lot of Muslims think they are good, but they donate money to Hamas and believe it's right to kill all the Jews and the Great Satan (USA) blah-blah-blah.

You might keep in mind that many Westerners do not want to hear about religion, of any sort, including Islam. For many it's total nonsense to them.

Of course as I am sure you know the vast majority of Muslims do not really follow the teachings.

Does that make sense?