> I'm pretty sure there are a number of people in the US who don't support the police in any way at all.
Yes, this is so trivially true of any place that it's not worth mentioning, as generalizations are meant as just that: Something that a majority (or at least a large minority) are like. For example, people do say "people in the US speak English", even though there's a number of people that don't. This doesn't make the generalization any less useful than "Americans like baseball" or "Americans wear shoes around the house".
Yes, this is so trivially true of any place that it's not worth mentioning, as generalizations are meant as just that: Something that a majority (or at least a large minority) are like. For example, people do say "people in the US speak English", even though there's a number of people that don't. This doesn't make the generalization any less useful than "Americans like baseball" or "Americans wear shoes around the house".