Can someone explain how such an order is legal and doesn't violate search engines' first amendment rights? As a search engine how can I be compelled to comply w

Can someone explain how such an order is legal and doesn't violate search engines' first amendment rights? As a search engine how can I be compelled to comply with this when this case has no relation to me? Furthermore if I an forced to comply how is that not a violation of my rights to free speech? And why should I be forced to spend my resources essentially censoring for the U.S. government? Is it now illegal to link to sites that may or may not have copyrighted content? Am I going to have to follow every single U.S. case going forward and keep on censoring for the government forever? Last I checked, this wasn't child porn, just simple web links.