Greg Gutfeld tonight sounded off on the news that the co-pilot of Germanwings Flight 9525 deliberately crashed the plane, killing all 150 on board.

Authorities say that co-pilot Andreas Lubitz locked the pilot out of the cockpit before crashing the jet. The secure door that the pilot was unable to get through was a product of the 9/11 attacks. Gutfeld called it “one appropriate adjustment, which reduced one risk while enabling perhaps another, a rogue pilot.”

“Evil is like water – find the unblocked path and never stopping in its quest to penetrate,” Gutfeld said. “Evil waits at the feet of the susceptible. The less vulnerable you are, the smaller the chance evil can win.”

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But Gutfeld noted that evil has a purpose – it helps us correct flaws in the system.

“If there’s any comfort in this horrible event, those people died hopefully so far greater numbers do not,” Gutfeld said. “The 9/11 deaths were never in vain for they spurred into action changes that saved many, many more thousands.”

Gutfeld said that humans will solve this flaw, though another problem will then reveal itself.

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“For as we work 9-5, evil is open 24 hours, 7 days a week,” he said.

Watch Gutfeld's monologue above.