Is there Biblical support for the concept of "Original Sin"?

Well, that is the whole myth of Christianity. Now, it appears the concept of Original Sin was taken by one sentence from Paul, and expanded upon by Saint Augustus. One sentence in the New testament, usually taken out of context is a mighty thin thread to hang an entire theology on.As for this whole hoopla about Jesus coming back.. how many generations of Christians have passed that expected Jesus back IN THEIR LIFETIME? After this amount of time, why should we expect him back at all?

No, the original audience was not Jewish. The audience were Gentile converts to Christianity. If the audience was Jewish , the Gospels would not have been written in Greek.

There are problems with the claims in Acts. 1) Acts was not written by Paul, so, it isn't Paul who is making the claims.2) When it comes to the theology and information that is discussed by Paul, rather than show any kind of knowledge of what Gamaliel taught, there is instead a contempt of what 'living under the law' meant. The lack of discussion of the theology of Gamaliel, and the very non-Jewish attitude towards the Law suggest this statement is inaccurate.. either a lie by Paul, or a story made up in his name. l