I don't think mental illness really changes whether or not you have a good heart. I've met many people dealing with mental illness who are gracious and compassionate to all people no matter their race. Though it's possible his views might have been informed by his upbringing or his environment. Perhaps mental illness impairs self-reform or the capability for better judgement, but it can't be said that the mental illness, in and of itself, was the fault of mental illness.