Mostly true. OTOH why let Centaur think he can make nasty bigoted remarks left unchecked?
Anyway there are other posters that ned that advice more than I do.
Back to the topic I'd be surprised if most of these threats were by radical leftys:
As More Jewish Facilities Get Threats, All 100 Senators Ask Trump Administration for "Swift Action" - Mark Berman
A new wave of bomb threats were made Monday and Tuesday to Jewish schools and institutions, including the New York and Washington offices of the Anti-Defamation League. A letter signed by every U.S. senator was sent to top law enforcement officials in the Trump administration, asking them to do more in response to the threats.
"We write to underscore the need for swift action with regard to the deeply troubling series of anonymous bomb threats made against Jewish Community Centers (JCCs), Jewish day schools, synagogues and other buildings affiliated with Jewish organizations or institutions across the country," the senators wrote. (Washington Post)