I actually had to think about this...
For me, It all depends on how big of an influence he was on the Feds decision to raid Murder Inc's office, and what him, Feminem, Dre and Jimmy Ivonine did behind closed doors. Because based on the sequence of events, that was the long term death blow to Ja's career. I'm perfectly fine with how 50 convinced the world that Ja was fake and that his music sucked, because he did that fair. He didn't force ppl at gun point to think that way, he made the argument and ppl agree'd with him. But the snitch shyt, nah.
50 made rat oriented music and told the feds to listen to it for information.That's informant behavior and it's not up for debate. However, I'm not sure about how much of an influence it really had with the feds. I know it played a role since the feds cited 50 as fueling their conspiracies. Preme also stated that the gov't was listening to woodface's lyrics like a wire tap. And Irv claimed that in questioning the feds repeated allegations that he heard 50 say about him in his raps, which is how Irv knew 50 was talking to the feds before reading the search warrant.
Basically, If Ja's career in the long term was cut short because of snitching than yeah, fukk 50.
And I'm not bias, I get it. 50 got stabbed, shot, and was dropped from his label, and them boys on Guybrew was craving to put more shells in his frame. With all those obstacles in his way he had to make decisions to save his life, feed his family, and keep his dream as a rapper alive. But at the same time, Curly brought this on himself. No one told him to diss Ja, he did that on his own. He started the beef so deal with the consequences like a man.
In the end though it's w/e. Like Ja said, "Cause I know snakes and snitches get it where they slither".