tauheed-the oneness of ALLAH
.........................This is the most basic foundation of ISLAMthat we worship none but ALLAH,it means that we bow our head only in front of ALLAH and not in front of others.
but we bow it in front of kabah?lol,the kabah which is in meccah is nothing more than a building,instances are there when hazrath Bilal(R.A.)stood up on the top of kabah to give azan,then why do we bow in front of it because it is the commandant of ALLAH,it is the spirit of islam,it is the way of worship in islam.
do muslims worship PROPHET MUHAMMAD(S.A.W.S)the answer is no,we do not
the PROPHET himself has said that do not make my grave a place of sajood(prostration)like the people of other religions have done,example christains
so here is also a message to muslims who go to dargahs(resting place of great people in islam not to make sajood there)i too go to dargah but only read surah fatiya there and not bow my head there................