When someone hates you for no damned reason, I think you'd walk away and dismiss that as crazy and avoid the person. The next time that person is around and hates you for no damned reason, you'd engage and try to see if there could be an understanding and what is behind this hatred? If it's batshit crazy and not based in reality, then you walk away knowing you tried. The next time that person who hates you for no damned reason is doing their hating, you then will hate them too just because they hate you for no damned reason and you're tired of that shit.