Original post by mariachiwell, as far as I know, Wahabis don't actually call themselves Wahabis - this is a rather derogatory term used by other people. If anything, Wahabis would call themselves rather "Muwahiddun" (Unitarists) or, in fact, "Salafis" . Wahabis is used in general by non-Wahabis to indicate an "ultraconservative" interpretation of Islam and in particular the one sponsored by Saudi Arabia and its "official" scholars.
As to Salafis, in contemporary speak, it is used for people who not only favour a literal interpretation of the Quran, but who also view 7th century Arabia as the ideal society, and tend to imitate Muhammad (and the first three generations of Muslims, the Salaf) while deprecating successive developments in Islam (such as Sufism, or even -for some- just following a madhab) as "bidah". People (both Muslims and non-Muslims) tend in particular to define as "Salafis" those who give importance to imitating Muhammad also in superficial details - such as dress, food, speech, physical appearance etc etc.
Muslims are a very composite Galaxy - so, as soon as someone says "we are all Muslim", someone will say : "yes, but (the Ahmadiyya, the Quranists, the Alawis, the Ismailis etc etc)" and then "the Sufis, the Salafis, the madhabs, etc etc"
As to divisions... well, any very numerous human group will differentiate at some moment : there is little chance of avoiding that, and Muslims are no exception.
Hope this helps... however, this should form part of a debate...