The American Civil Liberties Union (ACLU) has advised a public community college in California it must end improper religious-based anti-gay instruction by a staff science professor.

The civil rights group alleges that Professor Dr. Bradley Lopez's introductory health class is more preaching than teaching.

Lopez, who teaches at Fresno City College (FCC), “presents religiously-based and anti-gay views as 'science' or 'fact',” the ACLU said in a statement.

Lopez is accused of giving lectures where he taught that being gay is a “biological misapplication of human sexuality” and said that the “recommended treatment” is “psychological counseling” or “hormone supplements,” presented gay men and lesbians as a threat to society, used Bible passages as “empirical” evidence that life begins at conception, and asserted that abortion is “the leading cause of death in this country.”

Two students told the ACLU that their complaints to administration officials were dismissed.

“I feel very let down by my school,” said Jacqui Mahaffey, a 24-year-old student who took Lopez's class and complained to officials.

“I signed up for health science because I was interested in the subject, but what I got was hateful lecturing based on Professor Lopez's personal beliefs. I am in school to learn, not to be indoctrinated with one professor's religious views and anti-gay beliefs.”

In a demand letter addressed to the school's administration, the ACLU says “FCC must ensure that its instruction does not inculcate sectarian doctrine in violation of the federal and state constitutions” and that the school “can and should mandate accurate and unbiased health instruction.”

The letter also says Lopez's free speech rights do not extend to the classroom.

“To the contrary, as a tax-supported entity, FCC must of course comply with state and federal law, which prohibits religious indoctrination in public education.”

The ACLU has given the college until February 15 to take action.