Honestly, I find this to be one of the very few moments where the idea of “hate the sin, not the sinner” might actually apply.
Perhaps you could let himm know, in essence, that you love him while feeling uneasy about his actions. You might need some time to process this and try to figure out how to distinguish between the two. When the conversation wraps up, it could be helpful to reiterate that you do love him.
It feels somewhat sad, I think, that mental health in the US often seems like an afterthought.
