While most of the Muslims I've met have been perfectly nice folks, I don't consider my personal experiences with individuals to be the best way to evaluate groups.
In other words, the individuals I met are human beings, but in large numbers they are merely a statistic, and I'm OK with Muslims dying because my (questionable) economic analysis says they are a net negative for the bottom line of the United States.
While most of the Muslims I've met have been perfectly nice folks, I don't consider my personal experiences with individuals to be the best way to evaluate groups.