Free speech laws in the U.S. aren't going to be affected by joining this entirely non-binding measure.
It's about politics and symbols, frankly, but refusing to join this effort is quite depressing and suggestive.
Then again, it's not a surprise. Apparently the only type of extremism that matters to Trump is Islamic.
The administration has hobbled the infrastructure designed to prevent atrocities like Pittsburgh.
www.theatlantic.com
Furthermore, Trump himself has zero problems with making equal or worse political and symbolic calls for government regulation and intervention of the news or of social media spaces when it comes to opinions which bother him. Therefore, it's not like he is a firm, consistent believer in absolute free speech or freedom of the press.
I am not talking about percentages or proportions here, but...this is quite ironic, in light of the above.