The ex-Prez's oldest son made his pitch on his podcast, "Triggered with Donald Trump Jr.," where he opened Thursday's episode with a plea aimed at the MAGA crowd ... and, presumably, anyone else who's vowed to cut Bud Light out of their beer-drinking regimen.

He says he gets the indignation ... noting that, in his mind, Anheuser-Busch did indeed screw up by polarizing their key demographic with a stunt like this -- but he also says they deserve forgiveness considering some new intel he says he and his team have stumbled upon.

DTJ says Anheuser-Busch has actually donated a ton of money to Republican-led campaigns over the years -- including Speaker Kevin McCarthy's bid for Nancy Pelosi's job last year.

He also claims that -- according to some reporting he says he saw -- the whole Dylan Mulvaney move was actually the result of a rogue marketing employee at the company ... and that the higher-ups had no idea about it. In fact, Don says Anheuser-Busch is usually not as "woke" as its corporate counterparts -- and that they shouldn't be punished for this.

It's interesting that he's going to bat for the beer company, because they've actually taken a somewhat significant hit in the wake of all this -- reports suggest their market cap has fallen by as much as $5 billion in recent weeks ... although it's hard to say why exactly.

Some think it's a no-brainer -- the Bud Light ban appears to be working, and it's hurting their bottom line. Because of that, it seems, Don Jr.'s telling folks to stand down and buy again.