A University of Toronto professor mocked Americans on the 20th anniversary of 9/11 for remembering thousands of victims who died during the Sept. 11, 2001, terrorist attacks. The prominent Canadian academic called the day of remembrance a "dumb little annual pity party" in a since-deleted tweet.

Associate professor of philosophy Jonathan Weisberg, who teaches at the #1 ranked university in Canada, mocking the bereaved across the southern border Saturday: "i see the u.s. is having its dumb little annual pity party again."

Author, professor, and evolutionary behavioral scientist Gad Saad screenshotted the tweet before Weisberg could delete it from Twitter.

"Note that the butchering of 3,000 innocent people does not trigger this hero's ire," tweeted Saad. "But if you were to misgender him (check his bio), well, then that's linguistic genocide. What an execrable cretin."

"As soon as I made this guy's vile tweet about 9/11 visible on my platform, he protected his tweets. Academia is filled with innumerable such folks," Saad commented after Weisberg has since made his account private.

Saad continued: "The way that we honour the memories of those who lost their lives on 9/11 is to protect our societies from ideologies/belief systems that are antithetical to our liberties & freedoms. We should NEVER tolerate and acquiesce to grossly intolerant beliefs. NEVER. Not one inch."