Re: on original sin

Salâm

To accept, even from some Christians, the notion that 'Catholics are not Christian' is as ludicrous as Sunnis saying that Shi`is are not Muslim and vice versa.

Christianity, like Islam, is not monolithic.  There are different formulations of  'original sin' in Christianity.  Orthodox Christians, for example, say that all of humanity share the *consequence* of the original (first) sin, and are more guarded than Catholics in attributing the *guilt* of the original sin to all humanity.  

Islamically, the consequence of this sin (disobedience to God by succumbing to Satan's temptation) by Adam and Eve was to "go down (hubut) into the earth" from the Garden, and here on earth - for which Adam was created, see Q 2:30 - for their descendants to have a tendency to 'outwardness' and 'horizontality', to sin, despite their fitra, "primordial nature" or "innate disposition" to recognize tawhid and its consequences, and despite their collective bearing witness that Allah is their Lord (Q 7:172) and that they, and the jinn, were created *only* to worship Him (Q 51:56) --- see Sachiko Murata and William C. Chittick The Vision of Islam: The Foundations of Muslim Faith and Practice (UK: I B Tauris, 1996 & USA: Paragon House, 1995).

AbdulAleem