Less than a week after Donald Trump received a standing ovation for his remarks at the Veterans of Foreign Wars convention, the same group is criticizing him for his "out-of-bounds" criticism of the parents of a fallen Muslim-American soldier.

"Election year or not, the VFW will not tolerate anyone berating a Gold Star family member for exercising his or her right of speech or expression," Brian Duffy, the VFW's newly elected commander-in-chief, said in a statement on Monday.

Trump has come under fire from both sides of the aisle for criticizing Khizr Khan and his wife, Ghazala, whose son was killed while serving overseas in Iraq. Khan delivered a speech at last week's Democratic convention, during which he encouraged Americans to "vote for the healer, not the divider" and attacked the Republican presidential nominee for his rhetoric on Muslims and other minorities in the U.S.

"I was viciously attacked by Mr. Khan at the Democratic Convention. Am I not allowed to respond? Hillary voted for the Iraq war. Not me!" Trump tweeted on Sunday, shortly after Khan accused him having a "black soul" during an interview on CNN.

"There are certain sacrosanct subjects that no amount of wordsmithing can repair once crossed," Duffy said. "Giving one's life to nation is the greatest sacrifice, followed closely by all Gold Star families, who have a right to make their voices heard."

Trump spoke at the VFW's annual convention last Tuesday in Charlotte, N.C. His remarks were well-received, drawing heavy applause from veterans in the audience at the time.