Al Sharpton thinks President Trump joking about renaming a military base after him is more of the same old song the man has played time and again … think Song of the South.

We got the Reverend Sunday in NYC … not too long after Trump’s interview with FOX News’ Chris Wallace aired earlier in the morning. The Prez was asked about threatening to veto a military spending bill that has bipartisan support … all because it also seeks to rename national military bases named after Confederate generals, like Fort Bragg.

DT challenged Chris to come up with a new name .. and then he name-dropped Al out of nowhere.

Welp, the good Reverend has some thoughts on that … telling us it’s hard to make sense of what Trump’s getting at, because he says the dude’s so nonsensical. Still, in Al’s eyes … he finds it crazy that Trump’s so stuck on defending the Confederacy as a heroic cause.

It obviously wasn’t, as he points out — the rebels were traitors, and definitely on the wrong (and losing) side of history.

Rev. Sharpton has been on Trump’s case for decades, from the Central Park 5 to the racism spewing out of the President’s mouth, so Sharpton’s not surprised Trump got snarky on him.