What is the problem with what they keep saying? They don't want to send their would-be viewers to a site that promotes white nationalist content on their home page. Who would, besides racists and edgelords?
Imagine using WordPress to construct your website. If some page existed that listed all the sites that use WordPress, and that listed some disagreeable ones (as it surely would), that has very little impact on your usage of the software.
So, no. Either everyone is censored or no-one is. I vote for the latter, let the law decide what is allowed and keep it at that. If it isn't forbidden, it is allowed.
[1] this is not a joke, see https://www.vox.com/the-goods/2019/2/25/18234950/knitting-ra... where they seriously talk about 'Fiber artists of color' (?) pointing out the 'racism' (?) in the knitting 'community'.