was obsessed with String because of how clean the Barksdale Organization was -- it took some doing and it fed his ego & need to be #1 to be able to get them off the streets. Also, when he was investigating String, he knew he was a cut above anyone else in the streets. Saw this nikka at the farmer's market buyin fruit and taking college courses. Once he started to go official with the paper print, man's pride was shook. Really wanted to stop him before he became white-collar
Didn't have that energy for the Greeks because in Season 2 he was riding a fukkin boat for already pissing off the powers that be, also, the level of Organization the Greeks had was worlds beyond the Barksdales. Once word was up, they were in the wind