This isn't just a case of some abrasive people involved. The guy who runs the project, DHH, is an open and proud racist. He posts his very straightforward racist beliefs on his blog. He made ruby on rails, and after being rejected from the ruby community he's now trying to insert himself into the Linux/open source community. On top of that, the "distro" is Arch + some dot files. Despite that, he's managed to raise millions of dollars in outside funding, which is insane for open source project. Either his industry connections are willing to look past the racism and hand him a bunch of money anyway, or they actively agree with him and want to build a space for racists in the open source community.
Add in the AI stuff and people have plenty of reason to boycott this project.