Catholics and Jews
Yes. As of November 19, 2014, 35 US states recognize same-sex marriages and only 15 US states do not.
Yes, the majority of religions in the US are monotheistic, believing in one all-powerful deity. Christianity, Judaism, and Islam are the most prevalent monotheistic religions in the US, although there are also followers of polytheistic and other belief systems.
Generally, yes. However, the US does not recognize polygamy, and most states do not recognize same sex marriage.
Interfaith and spirituality is going beyond fanaticism in one religion. It is going beyond blind belief in your scripture, it is trying to accept the best practices of different religions and different faiths. And realizing that God doesn't belong to a religion, God is beyond religion. Religion is man-made. God is supreme, God is omnipresent, God is the Divine Spirit, the Soul, the Atman that lives within. Therefore, we don't have to change our religion, but if we believe in interfaith and we have taken the best of all different believes and faiths, we will evolve on the path of spirituality, which is the university that helps us graduate to Self-realization and God-realization.
Yes. Most countries recognize each other's legal marriages.
In many cultures it is very normal and right to have arranged marriages. In the US culture, it is not.
Because Religions separate us creating an us versus them climate.
Texas
As most religions patiently try to explain to us, human nature is sinful. People are selfish and demanding; therefore they have difficulty getting along and agreeing.
The term "other religions" is ambiguous. In the US and most of the western world there are Christians, Jews, Moslems, Mormons, Buddhists, Hindus, Wiccans, Native religions, Voodoo, Spiritualism, Scientology and many others. References to aspects of these religions and their beliefs are easily understood by most literate people. Practices of the religions (meditation, yoga, statues of the founders) are common even when divorced from the actual religious beliefs. All of these factors would class as mainstream acceptance to most observers.
Yes.
2,230,000 as of the year 2005