Christians believe they are born sinners, why sinners think they are righteous?
In fact, ALL are born sinners. Once you accepted Christ, Jesus still love you whether you go Church every Sunday...Because he has cleanse you clean spiritually. You are covered by the blood of Jesus.
I don't know, as i talked to Christian. Most of them has this characteristic of being individualistic. I would say Selfish and self preserving like most of the people of the World. Though, we had been taught that " Lord shall provide , according to his glory and riches in Christ". We had been taught also , For every beast of the forest is mine, and the cattle upon a thousand . hills. But most do not transpire such habits in their daily life.
I have knows someone who has bought air tickets for a family of 7 seven. 4 Adults and 3 kids. But she has only manage to buy extra baggage allowance for only 5. When it comes to boarding, they have to scramble and look for spaces in order to save $100 at most or even lesser.
For marriage, Churches and bible always advice people to marry within the same belief. Well, one way is to prevent more divorces through their counselling when marriage runs into problem. Pastor and the Church has a hold on the errant couple to prevent broken marriage and kids. Of course, Pastor and Churches won't come out openly and condemn such marriages though it is not according to their belief. If they do, they will be charge with sedition under the law of land. But within the 4 walls of Church , they will not encourage them to do so.