No, I meant it looks ignorant to refer to all people in any group with the same description. You should say, "Some of...."
That would be more accurate.
If you're a teacher you should know that, Miss Jen.
It also looks ignorant to lecture others for doing what you do.
We all limit our words here. Sometimes we say "some of" other times those words are, or at least should be, understood.
In the English language that is a correct way to address something. If we say "Relax", the "you" is implied. That lesson is learned in 4th grade English.
If a poster says "ALL Democrats are......." and you disagree, then that is the time to lecture.
If a poster says "Democrats are...." it can be assumed to be (by people well-versed in high school English anyway) on an as-the-shoe-fits basis.
Your lecture showed that you needed to call someone ignorant. That's all it did.
I'm glad I could help you understand English a little better.