2pac did take a beat from someone else. But,
1. the poeple he took the beat from didn't hate his guts.
2. The beat was sampled. He didn't take the exact bassline of the song and make another song.
3. The chorus was sampled. I'll give you that. A lot of hiphop is samples though, but with Jay Z basically using the same beat, the same chorus, and almost the same name as 2pac did on his song is overdoing it (yea it was "Me and My Girlfriend" but people CONSTANTLY refer to it as "96' Bonnie and Clyde."
4. Despite the fact that 2pac is dead, its important because the fall of 2pac seems to coincide with the fall of good radio rap music. The second Pac died, Puffy and Fam began to dominate the radio...Then No Limit, then Cash Money...all trends. Pac and Deathrow and others (Nas, Ice Cube) created music that stands on its own two feet through time, its not old 2 years after he produced it. If Pac was still here, music would be so much better. We all know that. Look at the influence he made when people who he openly dissed and hated use his music for their songs! How many wanna be Pacs can we have on the radio (Jay Z, Ja Rule, DMX, Lil Zane, even Nas a little) somebody make it stop!