Yesterday Pepsi was grateful for United, and today United is grateful for Sean Spicer: Twitter

White House press secretary Sean Spicer triggered an uproar on Tuesday by saying Adolf Hitler did not use chemical weapons. He later apologised after his comments drew immediate criticism on social media and elsewhere for overlooking the fact that millions of Jews were killed in Nazi gas chambers.

Spicer made the assertion at a daily news briefing, during a discussion about the April 4 chemical weapons attack in Syria that killed 87 people. 

Although Spicer apologised, social media wasn't all that forgiving. 

Well, yesterday Pepsi was grateful for United, and today United is grateful for Sean Spicer.

— George Takei (@GeorgeTakei) April 11, 2017

Ben Carson thinks slaves were immigrants. Sean Spicer thinks that Hitler didn't use chemical weapons. Did they both attend Trump University?

— Maddi (@maddibraps) April 12, 2017

Social media reacts to Sean Spicer calling concentration camps "Holocaust centers" https://t.co/12ThhE4k2S pic.twitter.com/aE3SG28jTk

— The Hill (@thehill) April 11, 2017

A reminder that Sean Spicer is the most articulate person working in Trump's White House.#FireSpicer

— steven pasquale (@StevePasquale) April 11, 2017

If donuts were awarded for dumb, Sean Spicer would have his own Krispy Kreme franchise.

— Stephen King (@StephenKing) April 11, 2017

But nothing was quite as harsh as the series of tweets put out by the Anne Frank Centre (US)

.@POTUS @realDonaldTrump MUST FIRE SEAN SPICER NOW FOR ENGAGING IN HOLOCAUST DENIAL. OUR STATEMENT BELOW. #Antisemitism #NeverAgain pic.twitter.com/4dB9ESCaZr

— AnneFrankCenter(US) (@AnneFrankCenter) April 11, 2017

.@POTUS @realDonaldTrump how does it feel to have a press secretary who engages in Holocaust denial? Fire your national embarrassment.

— AnneFrankCenter(US) (@AnneFrankCenter) April 11, 2017