Why did Notorious BIG and Tupac Shakur get shot?

In 1994 at a Mardi Gra march in Mobile Al. Big Daddy, New York, Tupac, Matt Damen, Ben affleck, Matthew Damon, and Sindee Hasam dehooded the KKK and big showed them the biggest blackest butt they will ever see that's where N.O.T.O.R.I.O.U.S. B.I.G. came from Ben Affleck gave him that name just before he was arrested for indesent exposure.