Every piece of evidence we have so far on the government shutdown shows the public is blaming Republicans most of all for the standoff. On Monday, an ABC poll showed 71 percent fault the GOP; 61 percent fault Congressional Democrats; 51 percent fault President Obama.

Yes, Democrats look bad. Yes, Obama is probably doing himself no favors by saying he won’t negotiate when the public wants politicians in Washington to work together.

But Republicans look considerably worse. And for the Right, the Republican Party is the only game in town.

This is what my fellow conservatives who are acting as the enablers for irresponsible GOP politicians seem not to understand. They like this fight, because they think they’re helping to hold the line on ObamaCare and government spending. They think that they’re supported by a vast silent majority of Americans who dislike what they dislike and want what they want.

I dislike what they dislike. I want what they want. But I fear they are very, very wrong about the existence of this silent majority, and that their misperception is leading them to do significant damage to the already damaged Republican “brand.” (Forgive me for making use of that horribly overused term, but it’s the only one that fits.)

The belief that the public is with them is based on two data points: First, twice as many people say they’re conservative as say they are liberal. And second, ObamaCare is viewed unfavorably by a majority of the American people.

Both are true.

But it has been true for more than 20 years that Americans are twice as likely to call themselves conservative — and in that time Republicans have lost the popular vote in five out of six national elections. The statistic tells us little about how Americans vote or what they vote for.

And it is true that, according to Real Clear Politics, Americans disapprove of ObamaCare, 51 percent to 40 percent. It is unpopular. But it is not wildly, devastatingly unpopular — though given the fact that it is now rolling out and appears to be as incompetently executed as it was badly conceived, it may yet become so.

If ObamaCare had been as unpopular as conservatives believed, their plan for the shutdown — that there would be a public uprising to force Democratic senators in close races in 2014 to defund it — would’ve worked. It didn’t. Not a single senator budged.

Their tactic failed, and now what they are left with is House Speaker John Boehner basically begging the president of the United States to negotiate with him.

One thing we know for sure is that it’s not an equal fight, this fight between a man who received 65 million votes nationwide and a man who received 246,000 votes in one congressional district in Ohio.

Meanwhile, Boehner is basically the face of the US Congress in the eyes of the public. John Boehner is also the effective head of the Republican Party. And the US Congress is viewed favorably by . . . 11 percent of Americans.

Eleven percent.

When I interact with these conservatives, they say they don’t care about the GOP; what they care about are conservative ideas.

They’re right not to assign special glory or power to a political organization and to hold ideas above party. But here’s the condundrum: There is only one electoral vehicle for conservative ideas in the United States — the Republican Party.

It’s one thing to refuse to waste your time buffing and polishing the vehicle so that it looks nice and pretty; that’s what political hacks do, and ideologues have every right to disdain such frippery.

But if, in the guise of making the vehicle function better, you muck up the engine, smash the windshield, put the wrong tires on it and pour antifreeze in the gas tank, you are impeding its forward movement. You’re ruining it, not repairing it.

It may not have been a very good vehicle in the first place, and you may think it couldn’t drive worse, but oh man, could it ever. And it’s the only one you’ve got.