While I really wonder how some people think that they can do whatever they like yet are assured that they have a free ticket to heaven just because they have faith in Jesus.
and yeah share some views with me please, I am curios to know.
I always wonder that also, and to be quite honest, their "logic" never makes much sense to me. But I will share the attitudes and things I have heard said.
I first wanted to say that I don't know that there is any church that teachings that an individual needs only to believe and nothing else. I could be wrong-- as I have not attended nor looked at the philosophy of every church in existence. But, I think all churches preach a gospel of righteous living, regardless of what they believe about eternal security or the ability to fall away. The very definition of being a Christian is to be a "follower of Christ." Just as muslims try to follow the examples of the prophet, a christian should strive to follow the teachings of Christ. If there is any church out there that actually teaches that individuals only need to "be saved" and can live as they wish otherwise, I'd be interested in seeing it.
That being said, churches may not preach it, but there are certainly many christians that believe in that manner. One might ask how someone could believe he could live as he wishes, when churches do not teach it. The answer is quite simple-- not all who profess to be a Christian actually go to church. I never cease to be amazed at the number of people who are christian yet never attend church. Also popular is the ever growing number of independently run churches that have no oversight and no affiliation. There is an individual on another forum I am on who professes to be a Christian, yet openly admits that he has never stepped foot in a church in his life. Yes, it is possible for someone to be a Christian and never attend church, but I think the real question is what is that individual doing to grow in his faith? There was someone recently who professed to still be a "baby Christian" after having made a decision to follow Christ close to 40 years earlier. This means that for close to 40 years the individual has probably done absolutely nothing to grow is his faith. I would probably be remiss to speculate all the things he has not done (or done). Could you imagine someone taking Shahada and then never cracking open a qur'an, not praying, never listening to a lecture, nor reading a book, never setting foot inside a masjid (nor islamic center, nor any other place as these), not taking any notice as to halal eating, etc. That is what some of these people are like.
I wanted to point these things out, because when we see individuals who claim to hold certain beliefs it is important to realize that these beliefs may not be at all representative of Biblical teachings.
One eternal salvation belief that is held by some churches does say that christians can not lose their salvation. For the most part, churches who hold that view would say that the individual who continues to live sinfully (as your example) was never saved in the first place.
The attitudes and beliefs I have heard espoused by individuals go kinda like this....
"Jesus loves you and that is all you need to know."
"We are no longer under the law..... we have been freed from the law..... Jesus fulfilled the law"
"All sin can be forgiven (except the unpardonable sin), and we are forgiven as many times as we ask."
"Since no man is perfect, we can not be expected to be perfect."
"My sins have already been forgiven when Jesus died. The payment was already made for them."
You can see where the above attitudes can lead to people believing they can do anything they want and never lose their salvation. Everything we are instructed to do in the Bible becomes excused by one or more of the above statements. Since "we" do not need to "do" anything to "earn" salvation (it is a free gift) then all "we" have to do is just accept it and live under God's grace.
I wish I could explain better why they believe that way, or how it is they come to believe that way. As I said, I do not quite understand it myself. If you get into a discussion with them they will simply go in circles.