I think this is true if you just disagree with someone. But the OP says the politician is abhorrent. Maybe that is youthful hyperbole. If so, I’d agree with you and encourage the OP to moderate their language. But if they truly find him (or his policies) abhorrent, I think they should stay far away.
There are politicians I disagree with, and I could absolutely see learning from working with them. But there are other politicians whose entire world view or life ethic is so antithetical to my values that I would need to stay away.