The web isn't just HTML and server side scripting anymore. A modern website uses Javascript for many key essentials of the site's operation. I'm not saying that's always a good thing, but it is a true thing.
It is no longer a reasonable expectation that a website work with JavaScript disabled in the browser. Most of the web is now in content management systems that use JavaScript for browser support, accessibility, navigation, search, analytics and many aspects of page rendering and refreshing.
More importantly, this will be easily undone later, unlike much of the other damage he has done or plans to do. Compared to those things, I can't get too worked up over this.