I read that they were talking about training and arming since they felt "outgunned" at the Berkely protests. The counter-protesters in Charlottesville had no such weapons because the vast majority were peaceful, run-of-the-mill activists and groups like Antifa almost had no presence. Antifa is an extremely small group and nowhere near as organised as the neo-nazi and white supremacist groups. If what you say is true, then no, it is not acceptable for Antifa to carry weapons. It was not acceptable for neo-nazi and white supremacist groups to carry weapons at Charlottesville or use a car as a weapon.