What's the main difference between the three abrahamic religions?

The main difference between the three Abrahamic religions is that most Christians believe in the Holy Trinity, that God is composed of three parts (Father, Son and Holy Spirit), but in Islam and Judaism there is only one god (similar to the 'Father') with no partner, son or equal.

Explanation:

the social historical theory explains the creation of the varnas, jats and of the untouchables. according to this theory, the caste system began with the arrival of the aryans in india. the aryans arrived in india around 1500 bc. the fair skinned aryans arrived in india from south europe and north asia.

on november 6 and 7, 1917 (or october 24 and 25 on the julian calendar, which is why the event is often referred to as the october revolution), leftist revolutionaries led by bolshevik party leader vladimir lenin launched a nearly bloodless coup d'état against the duma's provisional government.