Perry tried to equate anger with hate. He was wrong. Anger is normal, at least to an extent. Hate is abnormal because it's self-destructive.
Perry is mentally ill and hates a lot due to his illness. He wants to believe he is normal, but as you've seen, he hates anyone that is normal by screaming at them in all caps. This indicates emotional instability.
This forum has several people with whom I disagree, but who are emotionally stable. You, most of the members on the Nice Thread and Niblick on this thread are clearly in control of their emotions which means their minds are rational. Reason dominates their emotions. Everyone can have "off" days, but it's the overall trend which determines their relative position of normality.
Perry, like Jack and Mason, is irrational. Like Jack, I'm going to help him find himself.