Politics is a two party zero sum game. Everyone knows this. So if people in those groups want to vote and potentially win, they have to vote for D or R
Here is an example of why groups like that may vote one way or another.
Party A wants to pander to identity politics, restrict gun access, blame everyone for a natural climate change and tax accordingly, wants to move the country closer to a one world order, tax as much as they can cause government is better at handling their money (we can just call Party A Democrats), denounces white supremacists and militia members.
Party B says it doesn’t matter what your identity is everyone should have the same economic, academic opportunity and laws applied equally. Climate change will happen no matter what but humans should be good stewards of the environment, America first policy then help out other countries in need, tax as little as we have to since people are better at spending their own money (we can just call Party B Republicans), denounces white supremacists and militia members.
There is no relevant party B, C, or D to vote for. So if those undesirables want to vote (no one can stop them from casting legal ballots), even though both Party’s denounce them and don’t want their support, they would vote Party B because of the other issues I just brought up.