The NFL’s run of terrible press is over — when President Trump attacked the league Friday night in Alabama, 99.99 percent of the alt-left media reflexively fell into line in defense of a sport they were denouncing as barbaric as late as Friday afternoon.

You know that torrent of negative news the fellow travelers has been spewing out about pro football — the epidemics of CTE and spousal abuse, the league’s plummeting TV ratings, the half-empty stadiums in California, the $6 tickets going begging, etc., etc.?

Now that Trump has slammed the NFL, it is once again … America’s Pastime!

All it took was 90 or so seconds of the president fantasizing aloud about an NFL owner — like his buddy Bob Kraft, maybe, or his ambassador to the Court of St. James, Woody Johnson — reacting to the latest pampered prima donna to take a knee during the national anthem.

“Get that son of a bitch off the field right now!” the president imagined one of his fellow billionaires bellowing. “Out! He’s fired! He’s fired!”

Which would be the owner’s right, obviously. And surely a huge percentage of what used to be the NFL fan base is fed up with the endless PC posturing, both on the field and in the ESPN studios and on the sports pages.

The NFL’s appeal has faded, but not just among the deplor­ables. There’s a reason they are called “soccer moms,” after all. They wouldn’t dream of letting Junior put on shoulder pads. A football field is the furthest thing from a snowflake’s safe space.

But now the lemmings of the left feel compelled to defend something they loathed a mere 48 hours ago, because if Trump likes something, it must be bad. And vice versa.

It’s amazing how quickly the 45th president can rehabilitate the image of any loathed institution or individual, just by jumping on the pile. If only he could apply this magical touch to, say, repealing Obama­care, or building the wall.

The same week he brought the NFL back, Trump also single­handedly restored the reputation of Kim Jong Un, at least in the more fevered precincts of the left.

After he blasted Rocket Man in his speech at the U.N., the usual suspects went crazy. Chelsea Handler, the comedienne who is to humor what Colin Kaepernick is to quarterbacking (which is to say, below average) tweeted out that the North Korean porker “is a little bit more sane” than Trump.

In that same speech, Trump also slammed Iran as a “murderous regime” and described the chaos in Venezuela as the logical outcome of its socialist tyranny.

Indisputably true on both counts, but the point is, Trump said it, so it must be wrong!

Only one thing now could return the NFL to disgrace — the Patriots winning Super Bowl LII. After all, Bill Belichick and Tom Brady did the unforgivable. They endorsed Trump and that’s unsportsmanlike conduct, 15-yard penalty and loss of down.

Buy Howie’s new book, “Kennedy Babylon,” at howiecarrshow.com.