... does that excuse the behavior ? They murder multiple people. They are also clearly mentally fucked up, to be able to do something like that. It does not excuse the behavior. They should still suffer consequences for shooting up the school.

Kanye's situation isn't as dire, obviously. But the same logic should apply. He's mentally ill. Maybe his illness is the cause of his shitty behavior, maybe it isn't. But either way, both should be dealt with. And the illness should not be used as a cop out, a crutch, an excuse, for his behavior. Ever.