If Trump wins, they will be unleashed like never before. It will make the "Summer of love" look like a picnic. The aim for that will be to elicit a heavy handed violent response from the authorities that can be blamed on Trump to paint him as an authoritarian dictator. They will be all over the MSM (that no one watches any more) crying about how he is viscously attacking the "mostly peaceful protesters". Trump may need to bite the bullet and just fucking round them all up, interrogate them and forensically look into their communications and finances to uncover proof of who is funding them (we know it is Soros and Dem operations, et al). Declare them to be terrorist organizations and hunt them down wherever they are around the world. Even normies know that these antifa thugs are just the hired help of extreme leftist "elites". They have no sympathy in the wider community. They're a bit like Extinction Rebellion now, they think that they can use mid level violence to gain sympathy and stoke animosity against their enemies, but people have seen through that ruse. If these thugs were rounded up it would be massively supported by the population.