Why is everyone on tiktok talking about some "2-3 years in dagestan and forget" or "in what years guys"

cause, i just saw a video of a son who wears like black makeup while in the middle of the store while the mom was recording her son. but the comments on that video is talking about some "how many years" "holy zest bro ✌️😭" and "this was so hard to watch" along with the pictures of what i think is supposed to be Khabib (you know? the guy from UFC).

and while after i searched it up to see what's going on, and there were thousands of videos about taking videos from other gay men's videos, and at the end or during of the video, you will see Khabib on a podcast, talking about some "2-3 years in dagestan and forget"