The offence of the egalitarian God

Jesus was a radical. He was the friend of the weak and social outcasts. He taught that "first will be last and the last will be first" and how a poor beggar such as Lazarus could be heaven while a rich man would not (Luke 16:19-31).
This is quite offensive to those who believe (whether consciously or sub-consciously) that society should be ordered in a certain way and that ordering reflects the status of people before God.
But, the radical message of the New Testament is not new. This is also found in the Old Testament.
Consider Hannah's Song of Praise in 1 Samuel 2 

The Lord makes poor and makes rich;
 he brings low and he exalts.
He raises up the poor from the dust;
 he lifts the needy from the ash heap
to make them sit with princes
 and inherit a seat of honor.