When Khizr Khan spoke at the convention they cut away to a Benghazi attack ad on Clinton...
But now, surprisingly....there is this:
http://www.foxnews.com/politics/2016/07/30/trump-criticized-for-comments-on-muslim-mother-fallen-us-soldier.html

Rep. Ted Lieu, D-Calif., who served on active duty and is a colonel in the U.S. Air Force Reserve, criticized Trump and Ryan Saturday.

“Slandering a mom and dad who lost their son in service of our country is a new low even for Donald Trump,” Lieu said “What is more surprising is that Speaker Paul Ryan continues to stand by Donald Trump … I call upon Speaker Ryan to do what his heart has been telling him all along and withdraw his endorsement of Donald Trump."

Karen Meredith, a member of Gold Star Families, a support group for families who lost loved ones in the Iraq War, said Humayun Khan’s parents “showed great courage” by standing up in front of the Democratic convention and that for Trump “to insult their culture by saying that is why she did not speak is offensive.”

“This is an attack on all Gold Star Families,” Meredith also said.

Trump's comments come a day after he attacked retired four-star general John Allen while holding a rally in front of military aircraft in Colorado. The Republican nominee also slammed a Colorado Springs fire marshal for capping attendance at his event.