I'm saying you can't dress up and leaflet anywhere you want in public parks. That's essentially what these folks were doing. Some parks have rules that allow for it, others don't. Would I be happy if the parks made exemptions for these patriots and other groups I happen to support? Sure. Do I expect that to happen? No. Parks have rules. The fact that these people can't do their thing anywhere, anytime they want in a public park does not mean we are losing our freedoms.
And in fact that's one of the tests of government restriction of speech. If they allowed some and not others, they'd be in violation of the First Amendment, but by restricting all speech they're not.