If I remember correctly, your brother is not AT ALL a supportive person....I could see that you would take this as you being called stupid or something..
...could you remove him from your friend list? A simple removal shows you respect yourself, while not stooping to his level and writing anything mean back, you are not a mean person...a simple removal would be a quiet end to anything MORE happening, which is possible..
I removed my Mom from my friend list. I am at peace with this
I care about you, PM me anytime