Liberal Massachusetts should be ashamed of itself.

It pretends to be pro-diversity and tolerant of others while driving around the very blue state with Co-Exist bumper-stickers. But the truth is, most liberals only tolerate those who agree with them.

And that transparent phoniness and hypocrisy shined through — for all to see — this weekend when GOP front-runner Donald Trump’s new Massachusetts campaign headquarters in Littleton was vandalized with vulgar graffiti.

Yesterday, vandals spray-painted Trump’s new campaign facilities with a phallic symbol, curse words, “pig” and Nazi references spray painted across windows.

Did U.S. Sen. Liz Warren or any of the powerful pols that represent Massachusetts denounce the vile act? Did they tweet, “This type of hateful rhetoric and disgraceful assault on free speech won’t stand in a democracy that welcomes diversity of opinion?”

Did they post on Facebook that this type of “hate speech” directed at a Republican presidential candidate doesn’t speak to their “values”?

Crickets …

If a mosque is vandalized, or a Planned Parenthood, or the building of any “sacred cow” group or organization that’s in the liberal voter wheelhouse, they lose their cookies.

But when it comes to defending the basic tenets of a democracy — political free speech, not to mention the right of anyone to run for president and earn votes — this group of phonies went silent.

Nothing from congresswoman Nikki Tsongas, who represents Littleton.

Nothing from Seth Moulton, who tweeted yesterday that he’s opening a brand-new district office in Salem. How would he like his political outpost to be spray-painted with vile graffiti?

Enough said.

Adriana Cohen is co-host of “Herald Drive,” heard 6-9 a.m. weekdays on Boston Herald ?Radio. Follow her on Twitter ?@AdrianaCohen16.