Hey, this might be a little late now but, I don’t think you should worry about this. God has this under control, and whether or not Tupac goes to heaven, the judgement that God chooses would be the beat decision ?
I like Tupac’s stuff too, maybe not as much as you, but his music is really good. It is possible he could’ve lied in the interview, or maybe he actually believes those things he said. Either way, God’s got it handled.