It is only a matter of time before such verbal violence becomes physical violence. Most certainly not. Societies have always regulated marriages for the benefit of society and future children. One may not marry a close relative. Multiple marriage is outlawed.
Marriage is by definition between people of opposite sexes.
Anyone who is not already married is free to marry anyone else of the opposite sex who is not already married, provided they are not a close relative. Gay men and lesbian women are free to marry anyone of the opposite sex with the same restrictions any heterosexual has. Many gay men and lesbian women have married persons of the opposite sex. The restrictions on marriage are applied equally to all regardless of whether the person is homosexual or heterosexual. Just because a right is voluntarily not used, does not mean that right is denied.