Cloudflare are still providing services to a lot of politically noxious sites. What The Stormer did was claim that since Cloudflare accepted them as customers,

Cloudflare are still providing services to a lot of politically noxious sites. What The Stormer did was claim that since Cloudflare accepted them as customers, Cloudflare must have been sympathetic to their ideology and secretly Nazis themselves. The Stormer made a pretty big deal out of this, potentially doing severe damage to Cloudflare's reputation and driving away customers. If The Stormer had kept their mouth shut and not made a big public thing out of it, Cloudflare would probably still be providing services to them. Instead, they forced Cloudflare's hand by claiming them as ideological allies.