Texas handgun instructor Crockett Keller ran a radio ad saying he would not teach firearms usage to Muslims, non-Christian Arabs, socialist liberals or anybody who “voted for the current campaigner-in-chief.”

Keller is now under investigation by the Texas Department of Public Safety for possible discrimination.

He said he is “not a mean individual” but considers Muslims “our enemy” and believes liberals have “already proven” they cannot make a “prudent decision as required under law.”