Mayor de Blasio now says he was always against having the Puerto Rican Day Parade honor unrepentant terrorist Oscar López Rivera.

We hear he also told Secretary of State Hillary Clinton not to use private e-mail, urged Bill Clinton not to hire any interns and, as a babe in the womb, warned President John Kennedy against the Bay of Pigs invasion.

But back to the OLR debacle: “I didn’t think it was a smart idea to begin with,” de Blasio said Monday, claiming he’d held his tongue in public to give parade organizers — including chair Lorraine Cortes-Vazquez, one of his senior advisers — “some space.”

(Indeed, she had so much space that no one in the press corps could find her to comment during the weeks of controversy.)

If he says this loud enough and often enough, maybe someone will believe him.

Nothing in the public record backs up his account. On the contrary: Even after nearly every sponsor had dropped, and after most other electeds had opted out, de Blasio continued to insist he would march.

On the specifics of honoring López Rivera, he time and again deferred to the parade organizers — even blaming the news media for focusing on the FALN leader, whose group set off over 100 bombs, slaughtering innocents in New York City and elsewhere.

And he pointedly refused to join the condemnation of OLR voiced by so many, including his own police commissioner.

Instead, he falsely claimed the FALN leader had renounced violence and terrorism and said he understood “why so many Puerto Ricans . . . respect that he fought for Puerto Rico” — as if planting bombs counts as fighting.

Some now say he privately threatened at the very end to sit out after all. Yet not a peep was public until López Rivera announced he’d decline the National Freedom Hero honor and merely march.

It seems de Blasio realized that final damage control didn’t make him look any better, hence his bid to rewrite history.

Stop wasting everyone’s time, Mr. Mayor: You’d be better off working on finally producing that list of your donors who didn’t want favors from City Hall.

Or, better still, telling the truth.