Well I don’t know who your friend is, but he definitely got to see a doctor. This is not what the Rebbe holds or the people that the Rebbe put in charge of his moisdois.
I got some friends that are tzoikim, should I now smear the whole Judaism that they don’t believe in Torah sheh Bal peah?
I got a friend, his name is Bernie Madoff, should I go smear all jews as scammers?
I got a litvak in my shul that did a terrible sin (which I won’t mention) should I now say all litvaks commit it too?