If you're saying the GOP is running a KKK connected man for governor, the implication is that he has some kind of support worth speaking of. That's not the case. It's pretty easy to get on the ballot. This guy was a candidate for Senate in 2022, where he got 0.2% of the vote (1,139 votes out of 655,675.) I don't know if it was his buddies on Stormfront, or people who meant to vote for someone else.
As I noted in the post you didn't quote, the United States has shifted to a system where parties have little control over who's on the ballot.
This has some advantages. In New Jersey, the candidate of the Democratic party machine was the Governor's rich wife and she dropped out of a primary against a more impressive candidate when it became clear the machine wasn't enough to help her win.
There are arguments for getting rid of primaries, and bringing back the smoke-filled room where a small group of people make the big decisions with the idea that ordinary people should only have to pay attention to politics in November.
But we wouldn't be able to have it both ways. Giving the political machine more power to remove someone from the ballot will be used for corrupt ends, although a counterpoint is that the party has incentives not to do that because it'll hurt in the general election.
As for what I respond to, there's a finite amount of time and I didn't think an argument about whether removing pride flags from military bases is a hateful goal was going to be productive.