Stuff like that just doesn’t make sense unless we were seeing Israeli intervention in the situation through those people.
The guy was a Ukrainian born Israeli who got caught up in the national fervor of the moment. The fact he served in the IDF was incidental. Almost all Israeli adults serve in the military at some point, so no big deal.
I also remember reading about a couple of Ukrainian Americans who ended up on the Eastern front in one of the militia battalions. Similar story, as they got to wondering what they were really doing there after the enthusiasm wore off.
Don't get me wrong, the Israelis are definitely involved with the Ukrainian oligarchs, many of whom are dual citizens. I just don't think they had much to do with organizing and executing the coup, which was strictly a covert EU/USA effort.