It's becoming more and more difficult to separate Trump's attitudes from the GOP. And Trump certainly does not condemn the white supremacists or shoo them away. Is it a party-level strategy? With Trumpism it feel likes that sometimes. Though there certainly Republicans who have level heads.
Antifa is definitely crazy. In an interview with an Antifa protester in the Oregonian (Portland's major newspaper), he said their objectives were something like "No nations, no borders, no police, no prisons." That's crazy. They obviously just want to watch the world burn.
BLM... I don't think they're crazy. Their objectives regarding eliminating police misconduct and the imbalance in use of force against Black people are noble. The violence, looting, and vandalism that accompany many of their protests are IMO unacceptable. I've read several explanations for the violence. I was just reading one:
We cannot conflate the destruction of plateglass with the violence that is being protested.
www.thenation.com
They are not persuasive. Destroying the property of innocent people, regardless of skin color, is not furthering their objectives. And it is protesting the unfair with unfair behavior. That is illogical to me. Great leaders role model best behavior.