Using categorization as a way to justify prejudice

Hi guys, I'm usually a lurker on Reddit, but this sub and the related subs intrigue me, so here are some of my thoughts.

The main issue I have with The Red Pill is the way they classify all women into one category, as if 3.5 billion people in the world are one entity and all act the same way.

Today in my psychology class I learned about the use of categorization as a way to justify prejudice towards other groups. Yes, categorizing helps us to process information more efficiently; however, we tend to think that people who belong in one category are the same, which makes it easy to justify negative attitudes toward another social group. This usually applies to racism, but I think it can be applied to gender issues as well.

People also tend to think of members in their in-group as unique, and out-group members as homogeneous. For example, I know that the people in my social circle all have very different personalities and unique quirks, but someone on the outside looking in may think that we’re all introverted, geeky Asians with one type of personality. (This is known as “out-group homogeneity”.) Similarly, when we’re talking about gender stereotypes, due to the fact that some men simply don’t socialize with many women on a deeper level, they’ll tend to think of them as a homogeneous group.

This kind of thinking is problematic because it creates an “us vs. them” mentality, which further perpetuates stereotyping and prejudice.

Another thing I want to point out is how the act of stereotyping will cause those stereotypical traits to surface. Like a self-fulfilling prophecy.

In one psych study, maths tests were administered to both men and women in university. In one condition, the women were exposed to the stereotype that women are weak in maths. In the control condition, there was no such stereotype threat. The results showed that in the first condition, women underperformed compared to men. In the control condition, there was virtually no difference in performance. (Spencer et al., 1999)

So when The Red Pill constantly bring up negative traits they think women possess, aren't they simply helping make those traits more pronounced in the women that they encounter?

Thoughts?