Let's focus on what ravelry is there for. Yarn arts! It has, since its inception, been THE site to find patterns, many free, to sell patterns of your own design, to research yarns, and to find literally any information you could ask for about yarn, knitting, and crochet. The site is as politically neutral as you will ever find. Been on it for about eight years and never bumped into anything political. Not one time. Enjoy Ravelry 100% and completely support their enforcement of their longstanding rules against hate. <3.
I think you can tell by reading the recent rash of one star reviews that it's just a bunch of disgruntled people who did not like being restricted from expressing support of white supremacy.
If you're wondering, I suggest you go to ravelry and read the part where they have expressly completely welcomed everyone of any and all political persuasions as long as they simply don't post their hate. Seems a small and abundantly fair ask.