It doesn't matter that they're not doing those things you named, they're purposefully creating chaos and a culture of violence and intimidation, and it's not helping anyone.
The Democratic Party needs to denounce them and distance themselves from them, or Antifa will cost them elections. It's perilous for liberals to align with anarchist vandals who threaten police officers and intimidate people while hiding behind masks. These idiots seriously think of themselves as heroes, like their bricks and clubs are going to be what stops fascism in this country instead of millions and millions of voters, most of whom don't see criminal behavior as heroic.