Laws and rules do not apply to leftists, only to patriotic Americans.
Per Fox News today:
The U.S. Park Police reported that "many" in the crowd in Lafayette Park on June 1, 2020, started to get violent at 6:33 pm ET. The crowd wasn't entirely "peaceful" by any means. (I saw this myself on Fox News' live coverage on June 1st)
The U.S. Park Police also reported that they did NOT use tear gas. They said they used "smoke cannisters and pepper balls" to disperse the crowd.
CNN, MSNBC, CBS, NBC, ABC, etc. etc. all reported the crowd in Lafayette Park on 6/1/20 was "entirely peaceful" and that "tear gas" was used to clear the crowd out for 'Trump's photo op'.
FAKE NEWS. As usual.