BOSTON (AP) — Those who disagree with the Bush administration's policies in Iraq face the same charges that they are unpatriotic as Sen. John Kerry did 35 years ago when he spoke out against the Vietnam War, the Massachusetts Democrat said Saturday.

"I have come here today to reaffirm that it was right to dissent in 1971 from a war that was wrong. And to affirm that it is both a right and an obligation for Americans today to disagree with a president who is wrong, a policy that is wrong, and a war in Iraq that weakens the nation," Kerry said to a standing ovation Saturday at Boston's historic Faneuil Hall.

Kerry's speech came 35 years to the day after he testified before the Senate Foreign Relations Committee to call for an end to the Vietnam war.

"How do you ask a man to be the last man to die for a mistake?" Kerry said in 1971, a line that helped propel the decorated Navy combat veteran and Yale graduate onto the national stage.

The same question applies today as Americans wrestle with the mounting death toll in Iraq, Kerry said, speaking before about 500 supporters who punctuated his speech at least 20 times with ovations.

"Lives have been lost to bad decisions," Kerry said. "Not decisions that could have gone either way, but decisions that constitute basic negligence and incompetence. And lives continue to be lost because of stubbornness and pride."

Kerry also blasted those who question the motivation of retired generals who have recently called for the resignation of Defense Secretary Donald Rumsfeld.

"That is cheap and shameful," he said. "How dare those who never wore the uniform in battle attack those who wore it all their lives."

A few scattered chants of "run" and "2008" were heard both before and after the speech. Kerry, the 2004 Democratic nominee for president, has not announced whether he would run in 2008.

In response to Kerry's speech Saturday, a spokeswoman for the Republican National Committee denied the party questioned anyone's patriotism.

"While we have never questioned Democrats' patriotism, we do question John Kerry's motives, considering his eagerness to engage in political theatrics as he ponders a presidential run," Tracey Schmitt said.

Kerry reiterated his position that American troops should be withdrawn by the end of the year, saying that Iraqi politicians only respond to deadlines.

Kerry said while Iraq is different from Vietnam, there are some critical parallels.

"We are in the same place as we were when I came home from Vietnam and spoke out against the civilian leaders who were willing to sacrifice America's best in the interest of political self-preservation," he said.