First, antifa are not in an organized group with organized goals. As Snopes recently put it, all they really have in common as a group is opposing fascism, usually by opposing state violence and discrimination.I’m not too familiar with ANTIFA, but my understanding is they have the same goals as BLM but are aggressive and violent in their Mission in obtaining these goals am I correct?
Many are aggressive, and they to not swear to non-violence. However, almost always when there is violence, antifa are acting as a responder or protector, not an instigator.
Also, antifa stands for "anti-fascism", so if you were to use capitals, it would just be Antifa. However, since they are not in an organized group, I see even the capital "A" as misleading.