Supporters being victimized by the refugees they voted to flood into their countries. Anti-nuclear environmental activists causing billions of tons of excess pollution over the decades. Jews, Asians, etc. voting for DEI policies only to be systemically discriminated against. Prison abolitionists, restorative justice, abolish the police, etc. voters that are victimized by violent habitual offenders. LGBTQ+ voters that support unfettered Islamic immigration.
Don't go check out r/LeopardsAteMyFace, they ban left of center examples of people voting against their interests. People vote against their interests all the time because they've been indoctrinated and vote according to ideology, not rational self-interest.