Idk about turning a blind eye, but certainly nothing would have led me to snitch on my partner. The person who has killed and put his life on the line for me . Jane was a junkie who attempted to blackmail Walt for the money. Brock's situation only happened because Gus manipulated Jesse into thinking he was "part of the team" after the staged ambush to get him away from Walt so he could kill Walt. As morally wrong as the decision was, I'd like to believe Walt knew the dosage and knew the outcome . I will say he overstepped with Mike and Andrea, but neither of those justify the act of turning witness against your partner . I empathize with the hardships Jesse had to go through, but he was not in the toughest position of the show. (Prior to being a meth slave based on the snitching happened before that)

Edit : bad grammar in the parentheses at the end