Unless there is abuse or adultery there is really no excuse, and the Bible says if you divorce and marry another, or if you marry someone who is divorced, you commit adultery yourself.
"But I tell you that anyone who divorces his wife, except for sexual immorality, makes her the victim of adultery, and anyone who marries a divorced woman commits adultery." -Matthew 5:32
There are lots of verses but that is one good one.
Most Helpful Guy
People don't like admitting they don't believe in anything; it's partly why religions developed in the first place. Many people will identify as Christians even if they rarely attend church and are ignorant of the actual contents of the Bible. In Ireland (and I assume most other western countries), most 'Christians' only care about the main ceremonies (e. g. baptism, confirmation, weddings, funerals etc.). Priests here call this process "hatch, batch, dispatch" and don't like it. These ceremonies have become part of our culture as western culture was once genuinely Christian so people still follow the ceremonies. But most women who dream of marriage don't care about God's role in it, they want the love and romance. Therefore, marriage has remained important while it's religious aspect has become less relevant to many.
Religion has become less important but people are still raised with the idea of having to do these events (like marriage) so they will get married but won't care about what the Bible thinks if they get divorced. The significance of the religious part of marriage has declined (hence the ongoing push to legalise gay marriage). But people still identify as Christians because they don't want to admit that, really, they don't believe and don't really know what will happen to them when they die.0