That's true, but it's a different thing. Blocking a site on ISP level prevents users from viewing the site as opposed to blocking creators from presenting the site. It's a subtle but important difference.

Also, according to Wikipedia over a few days the site had its domain registration revoked by several providers, its Youtube channel, Discord, and Twitter accounts were banned, its links were censored on Facebook, and it was DDOSed by Anonymous.[1] If you look at the Wikipedia link it's actually nuts how much effort was put into silencing the site.

[1] https://en.wikipedia.org/wiki/The_Daily_Stormer#Site_hosting...