During Tuesday's White House Press Briefing, Press Secretary Sean Spicer made some questionable comments invoking comparisons between Syrian President Bashar al-Assad and Adolf Hilter.
Mr. Matthews said Mr. Spicer was likely referring to the fact that the former German chancellor did not resort to using chemical weapons on the battlefield even when defeat was imminent.
The White House did not immediately respond to a request for comment.
Johnson also said it was a "great shame" that the United Kingdom was unable to take military action to punish Syrian President Bashar Assad for allegedly using chemical weapons, as the House of Commons had scuppered a proposal for British involvement.
Speaking with reporters one week after a chemical attack killed 87 civilians and injured over 550 in Idlib province, Spicer said that Assad's tactics were not utilized by Hitler, "who didn't even sink to using chemical weapons".
A statement that overlooked the millions of people Hitler sent to the gas chambers, sparking outrage around the globe.
The spokesman apologized for his statement after stumbling over multiple attempts to clarify it.
"I mean, you know, and I hope people understand that we all make mistakes", he said. "He apologized, and he apologized from his heart, and I am prepared to give him a pass on this".
"I'm Jewish, and I didn't take offense at what he said because he was just trying to compare a small thing with a big thing", said Rosemary Stephenson, museum visitor. "Any attack on innocent people is reprehensible and inexcusable", Spicer said.
"I can't even believe that anybody in the media, much less all of the major networks, led with this story".
Mr Spicer said his comments were professionally upsetting because President Donald Trump had had "an unbelievable successful couple of weeks" and it was his job to amplify that message of accomplishment but "I've let the president down".
Jimmy Dore takes Spicer to task for his ridiculous comments, and the White Houses risky run up to war with Syria and Russian Federation.
The American Jewish Committee also denounced the comments, saying it was "astonished".
Congresswoman Jan Schakowsky said: "It is clear that this administration needs a history lesson and a staff shake-up".
'But if I'm President Trump, I'm like, well Jesus Christ, we're a laughingstock'.