For what it's worth he retracted that statement. https://www.stallman.org/archives/2019-jul-oct.html#14_Septe...
Damage control at best, hard to give it much weight given the circumstances.
Minds don't change in seconds, particularly around what language to use to describe an issue; it usually takes a few days of thinking.
It might be damage control, but realistically this whole blow up is absurd for a few emails on an academic mailing list. Academic mailing lists are supposed to be the best place in the world to encounter views that will change people's minds.
Another variant of his invented nomenclature besides per is perse which I'd rather not be called. It sounds like a child of purse and hearse.
this is the only time to my knowledge that stallman has ever gone back on one of his fundamental positions.