According to his tweets, he was thrown out of the game for rooting for the Lakers:
So I’m @ da Heat game right, rootin 4 da Lakers kuz dats my team & would u believe they got police 2 make me leave?! Wow! F#€k da Heat
Fans who were nearby, tell a different story. According to a series of tweets, posted by a guy name Danny Vega, Lil Wayne got into an argument with a HEAT fan and gestured that he had a gun which prompted security to throw him out.
Random guy yelled at Lil Wayne at #MiamiHEAT game. Weezy looked back, gave him a mean stare & gestured he had a gun. Weezy just got into argument with security at the #MiamiHEAT game. He got kicked out for gun gesture.
LOL @LilTunechi saying he got kicked out #MiamiHEAT game for being a #lakers fan. Its cuz he made a gun gesture at someone. Around white ppl.[…] There are mostly old rich folks & ppl with kids sitting around him. I think he’s a Kobe fan. But he always cheers for the opposing team in miami.