You couldn’t get more “clear cut” than what Israel is doing. It’s also a matter of degree. Invading another country is bad, but it is not a holocaust.
Besides, boycotting Russian products makes no sense in the West given that they are already sanctioned to hell. You’d have to go out of your way to send them money.
Important to note, looks like the server component is not self-hostable (and the client doesn’t E2E encrypt).