After a mass shooting at a Thousand Oaks, Calif. bar, Greg Gutfeld said Thursday that America should mourn the fallen and also "open ourselves up" to new ideas on preventing violence.

Gutfeld said that, to date, there are two main schools of thought when it comes to stopping future mass casualty incidents: gun control, or arming more civilians.

"The loudest voices only offer two choices," he said.

Gutfeld said that because many people are "paralyzed by fear" of being "pegged as violating someone else's rights," some future suspects tend to go unreported.

Sen. Mark Warner on New AG: 'Chances of Mueller Getting Interfered With Goes Up Dramatically'

'We're Hitting the Road': MS GOP Sen. Hyde-Smith Encouraged Ahead of Runoff Election

He said that the report that gunman Ian Long "terrorized" his mother -- with whom he lived -- was a red flag.

"If we can't house them [in psychiatric institutions], then at least tag them so they can't get a gun," Gutfeld said.

"We have to open ourselves up to uncomfortable ideas ones that take us out of our rigid teams," he added.

Watch more above.

'Ignoring Reality': Retiring GOP Rep Rips Trump For Blaming Losses on Lack of 'Loyalty'

The Five: Chelsea Handler, Joy Behar Give 'Outrageous' Excuses for Lack of 'Blue Wave'