President Donald Trump on Tuesday visited the Yad Vashem Holocaust memorial in Israel, where he left a short, one-sentence note where he thanked the Israelis for inviting him.

“It is a great honor to be here with all my friends — so amazing and will never forget!” the president wrote.

This short note stands in stark contrast to a lengthy message that former President Barack Obama left at the memorial when he visited it, in which he wrote that it reminded him of “man’s potential for great evil, but also our capacity to rise from tragedy and remake our world.”

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See a comparison of the two letters below.

Many Twitter users were appalled that Trump visited Yad Vashem and didn’t come away with any reflections about his time there, as he instead seemed to treat the experience like he was signing a high school yearbook, not visiting a memorial to the greatest crime against humanity in history.

Some top responses to Trump’s message follow below.

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Dear Holocaust,

It was great hanging out with you. Never change. Have a great summer!

Donnie pic.twitter.com/TnQbBtbv51 — Matt Christman (@cushbomb) May 23, 2017

He only knows how to write in 140 characters or less. — Amanda Long (@AmandaCLong) May 23, 2017

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looked like he was signing a high school yearbook. the only thing missing is "have a great summer" — Heather Ross (@OhEwe) May 23, 2017

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I've been there and the last word I would have used is "amazing." Sobering, humbling, sorrowful maybe but amazing nope. He's a fool. — FleurduMonde (@FleurduMonde) May 23, 2017

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He still had 84 characters left in that tweet…er, guest book message. — Scott A. Woodward (@scottawoodward) May 23, 2017

Trump, Obama notes left at Yad Vashem, Israel's memorial for the Holocaust. This makes me sad. pic.twitter.com/QgOpILPyeQ — ian bremmer (@ianbremmer) May 23, 2017

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https://twitter.com/ezramechaber/status/867006398642651136

The ultimate hollow man. — 🏳️‍🌈 esther rolle’s lost son 🏳️‍🌈 (@hughbalsam) May 23, 2017

I don't have the psych degree to diagnose the kind of pathology it takes to write something so trite after emerging from Yad Vashem. https://t.co/01fi8x98HY — Julie Roginsky (@julieroginsky) May 23, 2017