Incrementalism. They always start slowly, by saying that they are for religious freedom for marriage. Eventually they will take that away and force everyone to accept homosexual marriage. The next step is to gradually lower the age of consent to 12 years. Ultimately removing all age limits, as long as it is consensual. This is their main goal, to legally establish adult-child sex in society. Do not be fooled that giving them homosexual marriage will satisfy their sexual lust. They will keep pushing to remove all sexual barriers and taboos until there are no laws protecting children from homosexuals.
You will see a lot of violence then.