Same thing happened to me with a friend of a few years back in 2016. We were at a bar and someone mentioned politics and I talked with him about our support for Trump in the coming election. When I turned back to my friend he didn’t want to talk to me any more that night and insinuated “wow I didn’t know you were racist”. So I asked him “have you ever seen me be racist?” “No but why are you voting for someone who is?” A few weeks of trying to convince me I’m the one in the wrong and he finally accepted that no, I’m not a racist and that Trump support is not the same as racism. We’ve since parted ways anyway.