Trump has refused to back down from an assertion that "Islam hates us."
"Donald Trump’s inflammatory rhetoric has crossed the line."
"Why did he choose to become a Christian?" Limbaugh said of President Obama.
Roughly 68 percent think that extremists use religion as a justification for bloody acts.
"We can't sit there and say these are buddy-buddies of ours," Carson said.
Superior Mayor Bruce Hagen said Obama "destroyed the fabric of democracy."
“Sadly, a lot of people seem to be falling for Donald Trump’s appeals," O'Malley added.
“It will radicalize more terrorists," Malala Yousafzai said of Trump's rhetoric.
"He’s doing exactly the wrong thing," Graham said.
“A broken system allowed terrorists to come to our home and slaughter Americans," Palin said.
"This is a moment where real intregity is on the line," said Rep. Keith Ellison (D-Minn.).
“The Daily Show” said Trump attracts followers to a “radical ideology” on social media.
Rick Scott repeatedly refused to weigh in on if "Islam hates us," as Trump said.
Carson added that accepting Sharia turns Islam into "a religion of domination."
The GOP candidate calls the show of support "more than appropriate."
It's the first visit by Obama to a U.S. mosque.
Americans prioritize the religious freedom of some more than others, a survey says.
OPINION: The GOP front-runner responds to public concern by scapegoating a religion.
"We are all children of God," the liberal filmmaker told Trump.
The former boxing champ said every U.S. president has "offended some group of people."
"There is a big difference in this," the Iowa Republican said.
"This cruel and dim-witted thinking is not the stuff presidents are made of," he added.
“The state of Israel respects all religion," Netanyahu said of Trump's recent remarks on Muslims.
Democrat Michael Nutter says Trump's proposal on Muslims is "vile."