If you have Neoreactionary views, your general politics will naturally be Neoreactionary. So some people wanted to talk about it. Why is that a problem?

The problem was they were not able to stop talking about it. Because they had no other platform than Less Wrong where they could present their ideas to wider audience and try recruiting new people.

Also they loved to pretend that the rationalist community as a whole somehow supports their political beliefs, despite the polls showing cca 3% support.

Then at some moment Eliezer became tired of being known as "the guy who hosts the neoreactionary website" and publicly disowned them. They moved their politics to their own website called "More Right" (as you see, they still couldn't stop making hints that they are somehow connected with LW), so they finally had some other outlet.

(It also didn't help their PR that the known vote-manipulator Eugine was their supporter. I know, that's merely an argument by association, but it doesn't help to keep the debate rational and try avoiding mindkilling, if one side has a member that keeps mass-downvoting everyone who disagrees.)