Wouldn't say all, but for americans, yes, probably a lot of people. Some people are personally biased, some are just bigots, and a lot of those people probably don't take the time to know a great deal about islam or muslim culture, much less their politics or history. Then again, anyone who apposes and entire people can come across like a bigot no matter how knowledgeable they are. Still think it's better than dealing with someone who stakes a claim in lack of knowledge. Some people simply admonish muslim culture and it has little to do with war or political aggression, and their culture can't be separated from islam. If you talking about people who bring up the child bride of muhammed, then that can still be found in muslim culture today, so not sure how the romans apply. If you're talking about people who apply religious rituals, or what they see as repugnant cultural acts, to discussions of political aggression, then sure, you're disagreeing about their focus and correct that it's a poor argument in a political discussion. This doesn't necessarily mean all bigots have baseless points of view, or that knowledge of islam isn't sufficient to form an opinion about muslims in general. It just means arguing politics with someone who doesn't know much about politics, and thus doesn't acknowledge the full scope. It's understandable some people might only be interested in the political aspects, but they're difficult to complete dissociate from religion in some cases.
