Snoop Dogg Trolls LeBron James -- Kobe Never Left!!!

You didn't think LeBron James was gonna be able to pull this "Returning Home" thing off without getting some crap for it, did you???

Well, Snoop Dogg -- a hardcore Los Angeles Lakers fan -- was one of the first celebrities to fire a shot at King James ... with a little bit of help from Kobe Bryant.

Snoop just posted a pic on Instagram that shows the Black Mamba in the Purple and Gold with a caption that reads, "I Never Left."