Youtube censoring a commenter

Youtube is repeatedly deleting someone's comment on one of my videos. I don't know why but I suspect it's because that comment includes: "Another interesting, but perhaps unsafe, question to explore is ethnic/cultural variation in traits. Certain traits resulting from what more recent ancestors occupations were: https://en.wikipedia.org/wiki/Culture_of_honor_(Southern_United_States), https://www.science.org/doi/abs/10.1126/science.1246850"

The person who wrote the comment told me he has no idea why Youtube deleted it and, when trying to respond to another one of my comments, it was instantly deleted.

It seems like he's being just "silenced"/canceled by Youtube. Which disturbs me. A different person wrote a very political comment on another video which was MUCH more disagreeable than this person's very kind and informative comments. This person tried posting the same comment again and it was deleted again.

This is the first time it's happened and I wonder if it's the (very helpful) ethnic studies he provided which made him get silenced.

It really is unsettling how Youtube selectively chooses who to silence. There are commenters who can be MUCH more disagreeable yet Youtube arbitrarily chooses what's incendiary.

I refuse to skirt around topics for the sake of complying with Youtube, but recognize how if I produce content considered too "out there" (I was legit nervous about my Hunter Gatherer video since it praises Bret & Heather who have been cancelled before), I could get completely de-platformed. Which would then make everyone lose access to my less controversial work

I'm less incensed on my behalf, and more on these people who are being silenced for no good reason. Discouraged for sharing info.