It very clearly sets it to display = block the line after, if you ran a normal browser.
I tested the page with javascript disabled and manually set the html element back to display: block and it renders just fine.
Luckily Links2 supports neither JavaScript nor CSS. People in China should start using that, as to not take part in The Great Cannon.
That's the point he is making.
> if you ran a normal browser.
What's a normal browser?