It looks like a pattern

Generally speaking, yes, I think it is. It’s obviously wrong to make sweeping generalisations about groups of people based on things they can’t change such as their gender, skin colour, ethnic origin, country of birth or sexual orientation.

You could perhaps argue it’s slightly more acceptable, but still dangerous, to make assumptions about people based on things they can control such as their political and religious viewpoints.  But you certainly should judge people by what they do. By their actions. You shall know them by their fruits.