Historically, the great majority of our nation's wars from the Revolutionary War forward were marked by vigorous and shrill dissent. WWII is the great exception but one that colors the public mind, particularly when it is mentally bookended with the Vietnam War protests led by the New Left radicals ( a tiny but influential minority that were taken out of the political driver's seat by Nixon's ending of the draft. Most Boomer protestors were really anti-draft, not anti-war).

I think we can divide anti-war opinion into three groups:

a) Ideological and religious pacifists

b) Ideological leftists and academics who accept to some degree the New Left critique of America as a perpetually unjust, racist, imperialist society.

c) People who think the war was ill-conceived from the start or are unhappy with the way the war has been prosecuted ( too harsh, too soft, incompetent etc.) ranging from disappointed hawks to angry doves who are not anti-war or anti-American per se.

In my view the first and third groups may make a fair claim to the mantle of "dissenting patriot"; right or wrong on the merits of their arguments, they have the nation's best interests at heart.

The second group however, cannot make such a claim. A fundamental opposition to the United States and the values of the American creed and a celebration of alien values that lead this group to consistently sympathize with whomever the enemy of the moment might be is intrinsically incompatible with patriotism.

Serially supporting the Soviets, Castro, Hanoi, Pol Pot, the Sandinistas, Saddam Hussein, Slobodan Milosevic, Islamist terrorists, Saddam (a second time), Hugo Chavez and Iraqi insurgents can only be explained by a deep loathing of America and a desire to see it irrevocably changed into something else. There is no shortage of people like this and they tend to be well-educated, comfortably sheltered, upper middle class and influential in small ways.

But their anti-war views have little to do with patriotism.