Bill Kristol, the editor-at-large for the conservative Weekly Standard, said the invitation to Yiannopoulos was "despicable."
Ned Ryun, a board member for the ACU, likewise objected to the decision. He said on Monday morning that members of the board were not consulted on the decision.
"While I'm all for free speech, there is such a thing as vile, hateful speech that does not deserve a platform," Ryun tweeted.
Jonah Goldberg, a senior editor at the conservative National Review, described Yiannopoulos as "a promoter and apologist for the 'Alt Right,' a white supremacist coalition that seeks to be the alternative to mainstream conservative movement."
"That in itself should be the only red flag CPAC needs,"
Following the decision to disinvite Yiannopoulos, Goldberg responded with something close to an eyeroll.
"Apparently the racism and anti-Semitism wasn't a deal breaker," Goldberg said.