A private website isn't a megaphone. No one is forcibly making people visit a URL and read their content (Beyond say...spam or clickbait, and in that case, sure, I can sympathize with you). But the internet is a lot more like a library than it is a crowded city street with a megaphone.

You can go your entire life on the internet and not have to read an opposing political viewpoint. Especially if you read curated content from mainstream media outlets that don't allow commenting, voting, and social participation. Or simply skip the comments. It isn't that hard to avoid the "hateful" content.