But illegality is not the issue here. People simply have a right not to be associated with hate.
This is neither a right in any theoretical system of human rights I've seen, nor is there any practical way to disassociate people from a basic human emotion.
Also, don’t be cute about “hate”. We aren’t talking about the human emotion and you know it.
There is always a reason. The reason this time is probably:
"Gab is a popular gathering place for alt-right activists and white nationalists whose views are unwelcome or banned on other social media platforms. Early members included the right-wing provocateur Milo Yiannopoulos and Andrew Anglin, the founder of the neo-Nazi Daily Stormer website. Other well known users have included controversial media personalities Alex Jones and Carl Benjamin."
https://globalnews.ca/news/4604015/gab-pittsburgh-shooting-f...
Which is an extremely reasonable position.
(I've never heard of Gab.)
https://www.huffingtonpost.co.uk/octavia-sheepshanks/feminis...
https://www.independent.co.uk/news/media/ny-times-journalist...
Maybe the short format lends itself to people posting dumb, thought-free comments.
It doesn't just lend itself, it exists for that express purpose.
The problem is people using Twitter as a primary venue for discourse which need more context or nuance than the platform allows.