J.R. Smith Got Earful From LeBron-Hating Cop Before September Arrest

J.R. Smith got an earful about LeBron James from the cops who arrested him in Texas back in September ... and it came just moments before they slapped cuffs on him!

Turns out NOT every Texan has gotten over the Luka Dončić trade.

Royse City PD officers pulled Smith over on a Texas roadway on Sept. 28, suspecting there was a warrant out for his arrest. While they checked, they Smith step out of his vehicle ... and the chat quickly turned to ball.

J.R. told them he was a former NBA hooper who retired in 2020, and walked them through how he broke into the league, and the teams he played for, including the Lakers and Cavs.

When one officer asked if he had any rings, Smith said he had two. The cop…