Antifa is a term people associate with far-left pseudo anarchist groups that engage in property damage, physical violence and harassment. Wikipedia has more context if you're interested[1].
> And how was the "is there not a consensus on antifascism" question invalid?
I understand what you're saying and I agree to some extent. And I'm coming at this with someone who's been adjacent with the left for a long time.
But even reading the Wikipedia article, it describes such a broad range of ideologies and tactics that I think the only thing really unifying the term is literally being anti-fascist. This has been my personal experience as well - I know a lot of people who identify as antifa, but they vary wildly in how that manifests.
It's fair to argue that what people associate with "antifa" does not accurately describe all the groups or people who use it to describe themselves. But that doesn't really change the connotation of the term.
> And how was the "is there not a consensus on antifascism" question invalid?
It's not an invalid question, just a leading one.
[1] https://en.wikipedia.org/wiki/Antifa_(United_States)