Nah.
Every Facebook employee I've met, every one that I'm reading, they are sincere about what they're angry about.
It's a bad look, to assume some Facebook employee's opinions are being co-opted by... fucking Google? Apple? That's ridiculous.
I'm not even going to speculate why anyone questions some random Facebook employee's sincerity.
Instead I offer: Imagine if someone told you, every opinion you had, all the time, talked over you or told you to shut the fuck up and said, "Oh you're getting co-opted by Google, this is exactly what they want you to do, 'destroy our culture.'" And then, in the same breath, that guy defends, breathlessly, some idiot outraged over the removal of master/slave nomenclature, or some idiot trying to mainsplain crackpot sex difference theories to his female coworkers.
C'mon, you'd be mad as hell, it's so utterly ridiculous.