RedFox said:
The idea that everybody is a sinner and hellbound puts people on a guilt trip and keeps them within the Christian belief system by scaring them away from examining other positions.
If that's true, it's not a very successful agenda since many more people are "examining other positions" than have accepted Jesus as Savior.
... Saying that everybody except for Jesus was born with sin also helps to promote belief in Jesus being the savior.
It is the truth, so why not say it? We are all sinners. Jesus is the only sinless one. He is the only Who can save. He is the Savior.
Saying that everybody other than Jesus are sinners, regardless of who they are...
True; sin touches everyone, regardless of age, race, nationality, sex, religion, political party, financial or social status, etc. True equality.
There is also one Savior for everyone, regardless of age, race, nationality, sex, religion, political party, financial or social status, etc.
Each person, regardless of his or her place in life, can be saved the same way, by Jesus Christ.
...Christians feel drawn into Christian groups, due to the claimed common nature that the members have, so the beliefs could be promoted.
Most people do like to associate with other people who have common beliefs and interests. That is natural.