I understand his instinct to self-title his video as "I cover the war" which implies a noble journalistic service for viewers but in comparing other youtube channels talking about Ukraine that did not get de-monetized, I'm guessing his type of content crosses the line.
E.g. one of his videos shows a grenade being dropped on a soldier while he has his pants down taking a dump. His commentary is to joke about it and vocalize a "boom" sound effect. The video is not blurred out and he did not set the "age restricted" flag. I won't link the video directly but you can easily find it.
Another perspective to look at the above scenario... if Google Youtube splits ad revenue 55% creator + 45% to Google.... Is the public ok with Google getting 45% of ad money from someone cheerleading a war death?
That's not a rhetorical question. I didn't do a survey so I really don't know what the answer is.
I noticed that several other Youtube channels cover Ukraine topics without getting demonetized:
https://www.youtube.com/c/RealLifeLore/search?query=ukraine
https://www.youtube.com/c/Taskandpurpose/search?query=ukrain...
https://www.youtube.com/c/CaspianReport/search?query=ukraine
I'm guessing those channels will be fine because they don't show raw war footage while jeering at human suffering.
I don't know if Youtube automatically demonetizes because of an algorithm sweeping through the channels or there was a human that decided his particular channel.