It doesn't mean it's the whole group. Saudi men treat women like garbage. When I say that, it should be understood that I'm not literally talking about every single man in Saudi Arabia... nor does it mean I believe there is a genetic component to it.... But it's a pretty good observation to make... and have no problem with people pointing that out.
Then why don't you say, "Saudi men who treat their women like garbage" rather than "Saudi men" if that is what you mean? If I said "I hate circles" would you assume I meant "I hate red circles?"