We try to remove ourselves as much as feasible from the rest of the world and still be a light unto them and teach them. Yes to both questions. It is commanded that a man should marry, and it is even in our by-laws that a man and woman must join together. Mankind alone seems to have a problem following the teachings of Yahweh that every creature shall bring forth off springs after their own kind. All other mammals and fish do so unless acted upon by man.
Horses keep to horses, and cattle keep to cattle, and sheep with sheep, and birds to birds.
As is Bob Cats and Mountain Lions are both of the cat family. Jews marry Jews. Messianic Hebrews marry Messianic Hebrews and Christians marry Christians, with in this group there are Baptist and Catholics and others, they too should marry their own kind. Whites should marry Whites, Blacks should marry Blacks, Asians should marry Asians. Marriage today is hard enough with out bring into the marriage problems such as religious or racial, ethnic, and cultural difference.