Conform or shut up — that’s the gist of the Supreme Court’s decision Tuesday rejecting the case of Massachusetts student Liam Morrison against the town of Middleboro after he was barred from wearing a “there are only two genders” T-shirt to school.

The justices let stand a ruling by a federal appeals court that said it would not second-guess the decision of Middleboro educators to ban the T-shirt in a school environment because of a negative impact on transgender and gender-nonconforming students.

If there’s a group that should be second-guessed, it’s progressive educators.

Justices Samuel Alito and Clarence Thomas understood the assignment, and dissented.

The court should have heard the case, Alito wrote, noting that “the school permitted and indeed encouraged student expression endorsing the view that there are many genders,” but censored an opposing view.

Young Morrison got a harsh lesson in how things are done in a blue state: Liberal groupthink is gospel, dissenters are heretics who should be hushed.

Imagine if the 7th grader attended a school where the “only two gender” concept prevailed, but wore a “there are multitudes of genders” shirt on school grounds. He would have been handed a “resistance” badge and hailed as a hero.

But now, debating or even questioning gender identity earns one the label “transphobe.” Remember reasoned dialogue and respecting opposing opinions? We miss those days.

“This case presents an issue of great importance for our Nation’s youth: whether public schools may suppress student speech either because it expresses a viewpoint that the school disfavors or because of vague concerns about the likely effect of the speech on the school atmosphere or on students who find the speech offensive,” Alito added.

There will always be people who are offended. TikTok depends on them streaming clips of teary meltdowns over some perceived injustice. And as this case exemplifies, we are raising a generation of such snowflakes.

“Schools can’t suppress students’ views they disagree with,” said Alliance Defending Freedom senior counsel David Cortman, the group who filed the Supreme Court petition for Morrison.

“Here, the school actively promotes its view about gender through posters and ‘Pride’ events, and it encourages students to wear clothing with messages on the same topic — so long as that clothing expresses the school’s preferred views on the subject. Our legal system is built on the truth that the government cannot silence any speaker just because it disapproves of what they say,” Cortman said in a statement.

Our legal system is built on that, but progressive school environments aren’t. Rights are a one-way street.

“Students don’t lose their free speech rights the moment they walk into a school building,” said Cortman. Middleboro didn’t get the memo.

The Supreme Court’s decision will be seen in many circles as a victory, though it’s anything but. Students around the country who are engaged in current events were just told that if they swim against the tide, they will be beached.

Editorial cartoon by Steve Kelley (Creators Syndicate)