The Denver Post's most read columnist says he was fired by the newspaper for his belief that there are only two sexes.

In a Facebook post, Jon Caldara said he was dismissed because his writing was too "insensitive."

"My column is not a soft voiced, sticky sweet NPR-styled piece which employs the language now mandated by the victim-centric, identity politics driven media," wrote Caldara.

"What seemed to be the last straw for my column was my insistence that there are only two sexes and my frustration that to be inclusive of the transgendered (even that word isn't allowed) we must lose our right to free speech," he added.

The columnist said that he refused to bend the knee to "newspeak" and declined to "use only the words mandated by the perpetually offended," adding that conservatives are now mandated to "use the language of their ideological opponents."