As a Jewish person who suffers from bipolar disorder, I have no sympathy for Kanye West. Bipolar disorder turned me into an apathetic, irresponsible person, sure, but it never turned me into a fucking Nazi. There is no manic episode that could make me shout racist slurs, or spew such vile things. When I was manic, I turned into a promiscuous alcoholic, not a bigot. Turning into a Nazi isn't in the DSM5, I can assure you.
Kanye West has more followers on Twitter than there are Jews worldwide. He is one of the most famous people on earth. The fact he can go on an antisemitic rampage without consequences is terrifying. If you're not a Jew, your Jewish friends need your allyship more than ever right now.