I think that's way over generalized. I'm no SJW (whatever that ACTUALLY means), but I'm an ally for people of color, for LBGTQ, for Muslims, for all sorts of minority groups. If ally, as I interpret it, means that you can be open about who you are with me, what your beliefs are. You don't have to hide anything for fear of being ostracized or made feel less. It also means standing up to others if they try to marginalize those people while in my presence.Allies is a social justice warrior word that is basically “if you don’t agree with everything we see - you’re against us.”
And my circle of friends that also consider themselves allies, based on conversations we've had, experiences we've shared and actions I've witnessed, all fit that same definition of being an ally to those groups of people (and others).
I don't dispute that there are people with the 'with us or against us' thought process, but to weaponize the term ally to describe those people? That's a pretty giant leap in my mind.