Based on Sen. Marco Rubio's statement about "real and present danger" from same-sex marriage, I can only conclude he is not educated in depth enough to be president.
He ignores or is ignorant of the past history of religious conflicts between the Catholic Church and various Christian Protestant denominations and competing catechisms; not to mention the intolerance toward non-Christian religions, which is still with us, though to a lesser degree, in the present time.
Those who don't support same-sex marriage do so for a variety of reasons, including homophobia. Others don't approve of same-sex marriage because it doesn't conform to their definition of a religiously valid marriage.
But this is a country of "civil law," which should safeguard equal marriage rights for all citizens.
Folks can still marry according to their religion; same-sex marriage doesn't affect that.
But people's disapproval of same-sex marriage should not give them the right to block or discriminate against those who want to do it.
Most of them, like Rubio, claim to be Christians. It doesn't seem very "Christian" of them to seek out ways to hurt fellow human beings by ostracizing them for following their own providence in these matters.
Sandra J. Gander