Jesse Jackson was on hand for the event.
“This is a problem, if we don’t solve it, it’s going to eat our country alive,” he said.
Carson said political correctness is undermining national security.
In a video, ISIS mocked Muslims living in harmony with Hindus.
Vanita Gupta says anti-Muslim rhetoric "violates the defining values of our country."
"It's a good sign ... that he seems to be softening some of his positions," Sen. Jeff Flake said.
Sadiq Khan said Trump's rhetoric "plays into the hands of extremists."
The groups worry that a future president could dramatically expand current policies.
Cruz adviser Frank Gaffney offers a warning for Muslim Advocacy Day.
"The last thing we need is more polarization," the GOP presidential candidate said.
Trump has refused to back down from an assertion that "Islam hates us."
"Donald Trump’s inflammatory rhetoric has crossed the line."
A supporter on Thursday asked Trump to bar women with hijabs from working for the TSA.
Katrina Pierson attacked the president for previously saying civilization owes Islam "a debt."
Sanders said Americans must remember Muhammad Ali was a "very proud Muslim."
Clinton said Trump's foreign policy ideas should raise "red flags" for voters.
"It doesn't make any difference to me how he does," Trump said.
"It is possible to be a Muslim and love America," Sadiq Khan said.
“I don’t care if it hurts me,” the presumptive GOP nominee said Wednesday.
Zuckerberg is incresingly speaking out on political issues.
"We’re not going to let go of our American value system just because Ted Cruz is scared."
"There is a sick problem going on," Trump said.
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."