Snoop Dogg is a superstitious guy.
He doesn't rap about death anymore, because he doesn't want to die. In an interview with Fatman Scoop, Snoop acknowledged that he got spooked about because he rapped "Murder was the case that they gave me," before he caught (and beat) and a murder charge.
"What's crazy, is around that time me Biggie, 2Pac, Cube all the rappers at the time was writing what we was living. Some of us was writing life and some of us was writing death. It wasn't by accident that some of us wrote the life that led us to where we our now and the life that led us to the life that ended. Our pen was mightier than our sword. We don't knew that if I wrote a song called "Murder Was The Case", I'd be in a murder case. We didn't know "I see death around the corner", "If I Die Tonight", "Life After Death" that this would be actually coming to life."
Snoop Dogg has a history of ragging on Pac's lyrics. Last year, he revealed that he used to get into it with Pac about how the dead legend continued to disrespect women in his bars.