@OctoberMist,
Unfortunately, we sometimes have to generalize.
But this is not an excuse to always generalize.
During Apartheid, white South Africans were generalized as being racists. As a result, we made an effort to challenge those within our group who were giving us this bad name. And now white South Africans are not generalized against nearly as much as in the past. Currently, black South Africans are now bigger racists than whites are.
So, yes, it can be justified, but not in any absolute way, as it is a generalization. And, when the people concerned improve their behaviour, the generalization must cease.
Of course, in the past, white South Africans were generalizing against black South Africans in a similar manner. But; as a result, the behaviour of Black South Africans improved greatly.
But lets point out, that generalizing, is a two-faced coin. It can work, if it is done with the understanding that it is trying to improve the situation. It very easily falls down the slippery slope into unfair discrimination, or stereotyping.
However, it is also, very often, the only means people have to try and help the situation. It does get quite slippery at times.