That doesn't seem to be the case. It could be hypothetically (Cloudflare certainly has no interest in admitting that there's an upper bound to the DDOS they can mitigate and hackers have found it), but I think the "I remembered I'm a CEO in a country where there is not much restrictive policy on who a company chooses to do business with, and I think even my customers will agree 'Nazis suck and don't deserve a platform'" explanation holds here.