The fact that you try to claim both that the regressive left doesn't exist and that antifa is right-wing proves that you know literally nothing regarding what you're talking about.
The SJW left is what is also known as the regressive left, and they're called thus because they push for agendas that are antithetical not only to many western values, (like saying "the nuclear family is a bad thing") but are also often entirely contradictory. For example, LGBT activists claim they embrace Islam and hate "islamophobics", while in the UK, Muslim parents are /threatening/ to leave the UK if their children are forced to take classes that teach the LGBT agenda. This is the type of situation that led to the term "the left is eating itself".
Additionally, the rampant racism in the left is most embodied by those termed "regressive", and not just antifa. (Protip: if you think black people can't possibly succeed without a handout from the great white democratic savior, you're a racist.)
People with left-wing politics who think it's okay to send death threats to children on social media, even after the kids were proven innocent, those are also people who are called the regressive left. They're just as bad, if not worse, than the people from the alt-right who did the same thing to David Hogg.
As for antifa, you are either sorely uneducated, or just a complete, blithering idiot. Antifa is THE EPITOME of left wing. Do you even know what "antifa" means?
Here's a hint, it's short for "anti-fascist". In other words, they're the political opposite of fascism, which is ultra right wing, making them ultra LEFT-wing. They're actually modeled after the same group that protested Hitler and the nazis.
Antifa IS included under the "regressive left" umbrella, but sadly they're not the only people in there.
