Amid the fundamental transformation of America, saying, “Yes, I am a Christian” is a controversial statement.

But Republican presidential candidate Ben Carson doesn’t shy away from controversial statements.

Carson electrified Facebook Friday afternoon when his campaign page posted a photo of the doctor holding a photo that reads, “I AM A CHRISTIAN.”

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He added the hashtag #IamaChristian.

Carson’s declaration comes after 10 people were killed at Oregon’s Umpqua Community College. Witnesses say the murderer demanded to know the victims’ religious beliefs and “singled out Christians,” according to the New York Post.

Meanwhile, Carson stirred up controversy with the Council on American Islamic Relations, urging the IRS to investigate the group’s tax-exempt status.

The candidate launched a petition on his website, which reads in part:

The Council on Islamic-American Relations (CAIR), a U.S. Muslim group, recently demanded that I withdraw as candidate for the 2016 presidential race. By doing so, the organization has brazenly violated IRS rules prohibiting tax-exempt nonprofits like CAIR to intervene in a political campaign on behalf of—or in opposition to—a candidate.

This is not the first time that CAIR has disrespected U.S. laws or America. It has previously lost its tax-exempt status by failing to file federal taxes three years in a row. It had also been named by federal prosecutors as an unindicted co-conspirator in a criminal conspiracy to funnel money to Hamas, a terrorist organization.