Don’t buy the claim that the radical District 15 middle-school “desegregation” plan represents the considered, democratic opinion of Brooklyn communities.

In fact, the city Department of Education (intentionally or not) set up a process that got hijacked by activists and ideologues. They produced a plan that ditches admission criteria based on student achievement, test scores and attendance, instead imposing on every school an admissions quota of 52 percent of seats for poor students, English-language learners and homeless kids.

Now the plan’s being rushed through before the communities can weigh in.

Yes, the district Community Education Council just urged Schools Chancellor Richard Carranza to implement the plan. But that council is an appointed body — not an elected one.

As for the process that produced the plan: The DOE hired an outside consultant, WXY Studio, whose “engagement model” was developed for planning projects such as parks and housing — that is, changes where the chief concern is addressing the fears and grievances of the most vocal locals.

WXY held several community meetings, but only 500 or so people participated. Managing the whole thing was a DOE-appointed 16-member working group of school employees, parents and other locals.

Not all opinions at those meetings counted. Some Sunset Park parents, for example, said fixing school overcrowding was a greater priority. Others wanted to keep their local middle schools intact.

Nor did the broader public realize the process would produce a plan on which they’d never get a chance to vote — or even offer meaningful comment.

The New York Times is now reporting that “there has been little public resistance to the District 15 plan.” Sure — because the public hasn’t been given a real chance to speak up.