"We punish pedophilia. We punish incest. We punish polygamy and various things," Knapp told KTKA. "It's only homosexuality that is lifted out as an exemption."
Knapp argued that his sermon was rooted in Biblical verse.
"'If there is a man who lies with a male as those who lie with a woman, both of them have committed a detestable act,'" he quoted from Leviticus 20:12. "'They shall surely be put to death.'"
While sticking to his view, Knapp said he himself wouldn't attack homosexuals.
"I don't believe I should lay a finger against them," the Kansas pastor said. "My hope is for their salvation, not for their death."