It's the bigger picture though: Stringer wanted to talk bigger picture when it came to cleaning up the money and getting out the streets, but he didn't want to see the bigger picture behind what would happen if all his shit came to light. Hell, I can't recall but the nigga could've not snitched on himself about D'Angelo and Avon would've probably went at Mouzone on his behalf. Or did that setup occur before he even knew about the D'Angelo shit? To add even more insult to injury, he snitched on his best friend of damn near 30 years when he had the option of abandoning the crew like Cutty.
Stringer tortured Brandon, killed D'Angelo, cut deals Avon did not instruct him to while using Avon's name to do so, and THEN snitched to get him jail time.
Stringer is that dude that yells Stop Snitching and the minute he get cornered, he telling on everybody. Worst. Kind. of. Person.
End of the day: Stringer had Stringer killed. Not Avon.