Sth is abhorrent to you means that you have hatred of it or you dislike it very much. For example, 'Racial discrimiantion is absolutely abhorrent to me'. But Can I say sb is abhorrent to me? For instance, The guy is abhorrent to me. Is the sentence accepatble?
If you look at how
is usually used with nouns to which abhorrent are often applied: behavior, act, crime, practice, thing. not so much directly with people. If you find someone's behavior abhorrent, you will probably find them
repulsive - tending to rouse aversion
which is how somebody would usually be described
I am repulsed by that person's abhorrent behavior.
That person's abhorrent behavior repulses me.
Your sentence is perfectly valid. If something is abhorrent to you it means you consider it totally unacceptable, or hate it very much.
- Racism of any kind is abhorrent to me. (Cambridge Dictionary)
...abhorrent is an adjective