It was a dumb thing to say, if factually accurate on the most basic level. It was also already a forgotten statement two days later when he was suspended, so seems like an overreaction by HR to me, but they would rather overreact now than risk (as minimal as that risk is) a bigger incident down the road where it looked like they covered up/ignored minor moments like this one.
Decent odds this is something a 49er player (possibly a player of color) on defense told Tim Ryan when he asked them about the challenge of playing against Jackson. Most of what Ryan will relate has origins in the locker room with him rephrasing.
EDIT: Fixed some aspects of time frame, and added second paragraph.
[ Edited by captveg on Dec 5, 2019 at 8:13 AM ]