There’s no sign that Hillary Clinton will forgo a run for a Democratic presidential nomination in 2016 that appears to be hers for the asking. But should she pass, New York Governor Andrew Cuomo will likely be one of the main contenders. As such, he has spent the last year shoring up his left flank by departing from the moderate policies that he ran on in 2010 and that characterized his first two years in office. But Cuomo’s pivot left has now escalated to the point where he not only wishes to impose liberal ideas on a blue state apparently all too eager to accept such dictates but to make it clear that those who oppose him are no longer welcome to stay.

That was the upshot of a remarkable rant by Cuomo on a public radio station in Albany. As the Albany Times Union reported, in the course of an angry critique of the national Republican Party and as well as New Yorkers who oppose his SAFE Act—a draconian gun-control bill railroaded through the New York legislature not long after the Newtown massacre—Cuomo said the following:

You’re seeing that play out in New York. … The Republican Party candidates are running against the SAFE Act — it was voted for by moderate Republicans who run the Senate! Their problem is not me and the Democrats; their problem is themselves. Who are they? Are they these extreme conservatives who are right-to-life, pro-assault-weapon, anti-gay? Is that who they are? Because if that’s who they are and they’re the extreme conservatives, they have no place in the state of New York, because that’s not who New Yorkers are.

Cuomo’s astonishing statement may please a suddenly ascendant left wing of the Democratic Party that is now feeling its strength after the election of Bill de Blasio as mayor of New York City and thinking about how it could influence the 2016 Democratic race. But it also demonstrates a disturbing degree of intolerance that illustrates the general rule of thumb, that conservatives believe liberals to be wrong and liberals think conservatives are evil. While this will endear Cuomo with his party’s base, it may come back to haunt him if he ever gets the chance to campaign on the national stage.

Cuomo’s reference to abortion opponents is especially interesting in the way it seeks to declare them not only out of the political mainstream in New York (which is undoubtedly true) but also worthy of being driven out of the Empire State. As Kathryn Jean Lopez noted in National Review on Friday, the governor’s rant demonstrates the distance both the Democratic Party and the Cuomo family have traveled in the last 30 years. As Lopez writes, in 1984, one of Cuomo’s predecessors as governor of New York—his father Mario—famously articulated a nuanced position in which he restated his personal opposition to abortion while defending its legality and public funding.

This same intolerance is made manifest in the federal ObamaCare mandate that seeks to force Catholic charity groups like the Little Sisters of the Poor pay for abortion drugs and contraception for its employees. That is a far cry from Mario Cuomo’s attempt to build a wall between private opposition to abortion and a public right to it. The Democrats of Barack Obama and Andrew Cuomo will now brook no opposition to their dictates or, in Cuomo’s case, even allow opponents to reside in “his” state.

However, the spark for Cuomo’s anger—opposition to the gun bill he promulgated in his State of the State last year and then rammed through the legislature inside of a day as a sop to public anguish about Newtown—also demonstrates the incoherence of this new extreme liberalism. The SAFE act imposed new bans on assault weapons, gun magazines, and imposed even broader rules for background checks for legal gun purchases. But in the year since it was passed, it has gone largely unenforced since it has sown almost universal confusion among law-enforcement personnel and gun venders and owners who are unsure what is and what is not rendered illegal by the vague language in the sloppily-drafted legislation Cuomo championed.

One needn’t be an opponent of legalized abortion or a member of the National Rifle Association to understand the dangers of this sort of rhetoric and a legislative agenda driven by such sentiments. Liberals have spent the past few years posing as the champions of tolerance while denouncing the Tea Party and conservative Republicans as extremists. But now that the left wing of the Democratic Party has taken back the reins of the party from more centrist forces—or in Cuomo’s case, a former moderate has put his finger in the wind and changed his direction accordingly—the same dynamic could undermine their attempts to win national elections. Just as the GOP must worry about letting its most extreme elements dictate policy and candidates, Democrats should think twice about the spectacle of one of their leading lights going so far as to tell opponents of abortion and gun control to leave New York. If Clinton passes on the presidency and Cuomo makes a run for the White House, that intolerant line won’t be forgotten.