In America, people are free to support candidates of their choice. They’re also free to boycott companies they don’t like.

And, as the matter of real estate mogul Stephen Ross and President Trump reminds us, they’re also free to be stupid.

Only dead brains can explain the overblown “backlash” over a Ross-hosted Trump fundraiser in the Hamptons. Despite over-the-top media coverage, it’s a few noisy guys on a street corner by today’s jungle-law standards.

It consists of a few cranky Equinox and SoulCycle fitness club members calling for a boycott, one Miami Dolphins wide receiver and chefs David Chang and José Andres.

Ross’ Related Companies owns the health clubs, the NFL Dolphins and the Hudson Yards mall where Andres’ Mercado Little Spain food hall is a tenant. Ross also invests in Chang’s Momofuku eatery empire.

Andres (“a good man,” he says of Ross) and Chang didn’t call for Ross’ head — they just begged him to drop the fundraiser. Chang said that Ross’ support for Trump “contradicts what I hoped to accomplish before taking your money in the first place.” Well, if Chang is so disgusted, he should make his point by giving the money back to Ross.

At least the chefs were polite, unlike minor comedian Billy Eichner, who boldly and bravely said he canceled his Equinox membership over Ross’ enabling of “racism and mass murder.”

Temperate or insane, they picked on the wrong guy. Equinox and SoulCycle employees, who owe Ross their livelihoods (and thanks for creating the first-ever Equinox Hotel at Hudson Yards), need some serious shaming for scrambling to distance themselves from a Hamptons lunch to which they weren’t invited.

Ross, a friend of Trump’s for 40 years, embraces more of the orthodox liberal social agenda than just about any multibillionaire real estate mogul. He’s positively woke on some positions, which must drive Trump crazy.

But for Trump-hating absolutists, anyone who offers him aid or comfort of any sort is to be excommunicated from the world of respectable society and discourse.

Idiots might think Ross, on some level, acquiesces in Trump’s toxic views on immigration, economic inequality, the environment and other hot-button topics. Or that he’s on board with Trump’s venomous way with words on Twitter.

Fact: Related Cos. is the most prolific private-sector creator of affordable housing in the country — not just lately but since the 1970s.

Sure, Related built a relative handful of super-luxury condos at Time Warner Center and Hudson Yards. But it built and owns many, many more rental apartments in the United States — at least 70,000 — and of them, more than 70% operate and are rented under one or more local affordable-housing programs.

Ross personally donated hundreds of millions of dollars to the University of Michigan (his alma mater) and NYU, neither of which is to be mistaken for right-wing Bob Jones University.

He’s a director of the World Resources Institute, which supports environmental sustainability and seeks to address climate change. He founded the nonprofit Ross Initiative in Sports for Equality, which champions social justice and aims to eliminate racial discrimination.

I’ve covered Ross, a rare gentleman in an ungentlemanly business, for years. His principled, nuanced positions on social and economic issues — the kind we once called “humane” before everything in America was politicized by left and right alike — are anything but Trumpian.

Why would he help Trump raise a few bucks? It’s a complicated world out there, folks. Maybe Ross — a developer with fortunes at stake every time his company lifts a shovel — would rather back a traditional, centrist Democrat who didn’t regard capitalism as a form of original sin. Too bad no such candidate exists in a field of far-left socialists and gaffe-prone bumblers with no chance to win.

Let the haters have their moment. I’ll bet that Equinox survives the purge.

scuozzo@nypost.com