Let's look at what you said again:
"Among his faults the man uses a lot of racist slurs. I won't and don't excuse that. I don't care how eccentric, imbalanced or in need of better psychiatric care and drugs he is. I wish to point out that his behavior is totally and utterly unacceptable."
- "Among his faults..."
His "fault" is a mental disorder. You have a very 17th century approach to that.
- "I won't and don't excuse that."
Fine, that's your choice. But when you choose to attack someone over their mental state, you become the insensitive, intolerant jerk in the room. Again, you have a choice whether to attack someone over their mental state; your victim didn't choose to be disabled.
- "I don't care how eccentric, imbalanced or in need of better psychiatric care and drugs he is."
I think you make it abundantly clear that you don't care. Again, that's your choice, but it shows exactly what kind of person you are. Would you also not care if it's a loved one who is afflicted with a disorder? Based on what you've said so far, I have to wonder.
- "I wish to point out that his behavior is totally and utterly unacceptable."
Behavior that, again, is out of his control. You are blaming a patient for being sick. That is reprehensible. Yes, he needs help, but what you are doing is the opposite of help, especially since you know for a fact he reads this forum (and in fact I think that is your true motivation for attacking him here).