Would you have trouble with a "pro-welfare-state-conservative" or a "pro-pornography-conservative?"
Ethics have always been a part of what conservatism means--and is what separates us from libertine libertarians. So while strictly speaking "religion" doesn't define conservatism, living in an unethical way denies conservatism.
Active homosexuals, who act by having perverted sex with persons of their own sex, are by definition unethical, and therefore, not conservative. I'd say it is difficult if not impossible to be an "atheist-conservative" too, as atheism has no logical basis of ethics...which is the heart of conservative principles.
Homosexuals or atheists may have conservative ideas about certain areas, and be our allies in many ways, but ultimately they fall in the libertarian camp, and their ideas on family, or religion--are destructive to America.
Active homosexuals, who act by having perverted sex with persons of their own sex, are by definition unethical, and therefore, not conservative.
Not a good argument. Basically you state that anyone who violates any ethical standard cannot be conservative. Which would mean that anyone who has ever done anything wrong, ever, is not a conservative.
Which eliminates everyone.