U.S. President Donald Trump was roasted on Twitter after the president said “I just want to congratulate Poland" when asked if he had a message for the country on the 80th anniversary of World War II.

Trump added, "It’s a great country with great people. We also have many Polish people in our country; it could be 8 million. We love our Polish friends. And I will be there soon."

Leaders from around the world sounded a “Remembrance and Warning” bell during emotional ceremonies on Sunday honoring the fighters and victims of World War II that began 80 years ago with Nazi Germany’s attack on Poland.

>> Read more: The 80th anniversary of World War II: Mixing victims in with perpetrators ■ The Germans, the Jews and the Poles are on the battlefield again | Analysis

Attending the ceremony in downtown Warsaw on a sunny Sunday were U.S. Vice President Mike Pence, German President Frank-Walter Steinmeier, Ukrainian President Volodymyr Zelenskiy and many others.

Trump’s congratulatory comment was met with scorn on Twitter as users pointed out the fact that Poland suffered immensely as a result of the event being commemorated.

One Twitter user replied to a video of the comments, “The guy has no idea what happened in 1939.” While another joked, “[walks into a Hallmark store] Hi, where are the Congrats On Your Nazi Invasion cards?”

“The anniversary of the darkest day in Poland's history and he congratulates them. Wow. Just....wow!,” wrote another satirist. Jeet Heer, the national-affairs correspondent for The Nation, joked “Bret Stephens: I'm going to make the stupidest possible statement about Poland and World War II. Trump: Not on my watch, buddy.”