Abu Sa’eed al-Khudri (Radiyallaahu `anhu) narrated that the last Prophet of God (Sallallaahu `alayhi wa sallam) said,
“You will certainly follow the ways of those who came before you, span by span, cubit by cubit, until even if they were to enter a lizard’s hole, you would follow them.”
We said,
“O Messenger of Allaah, (do you mean) the Jews and Christians?”
He said,
“Who else?!”

Al-Bukhari reported on the authority of Abu Hurairah (Radiyallaahu `anhu) that Allah’s Messenger (sallallaahu ‘alayhi wa sallam) said:
“The Hour will not come until my nation will follow completely and literally the errors of the previous nations.”

The Prophet of Allah (Sallallaahu `alayhi wa sallam) said:
“Whoever imitates a people is one of them.”