Ron Paul wants to define life as starting at conception
So? He doesn't favor any federal definition of murder. Any federal declartion that life begins at conception would be purely symbolic under a Paul administration.
build a fence along the US-Mexico border
Mr. Paul has stated in numerous debates that he is not in favor of a border fence because it would not be effective, would interfere with life on the border, and could eventually be used to keep Americans from leaving, but he would beef up security on the border using the Army.
prevent the Supreme Court from hearing cases on the Establishment Clause or the right to privacy, permitting the return of sodomy laws and the like (a bill which he has repeatedly re-introduced),
Which state is going to reintroduce sodomy laws let alone actively enforce them?
pull out of the UN, disband NATO,
Good. NATO serves no purpose other than to provide a cover for neo-colonialism. The UN is a corrupt organization that seeks more and more power.
end birthright citizenship
Dumb idea.
deny federal funding to any organisation which "which presents male or female homosexuality as an acceptable alternative life style or which suggest that it can be an acceptable life style"
This was from 1980. If we're going back that far we might want to go back to his 88 Presidential campaign when he favored free immigration.
the sole vote against divesting US federal government investments in corporations doing business with the genocidal government of the Sudan
He has voted against all foreign sanctions. It's a philosophical position because he believes that innocent people shouldn't be punished for the crimes of others and that sanctions are the wrong way to best effect change in foreign countries.