There was a time when Christians believed their God wanted them to kill and conquer. But that was nevertheless the same God Christians worship today.
Are you referring to the conquistadors or the crusades?
No such instructions exist in the Bible. The Koran on the other hand, trashes Christianity and Judaism and contains express instructions to exclude, kill and enslave them.
Sounds like the same god to you? Anyone who thinks muslims worship the same god as Jews and Christians have either never read the koran, is a dumb sucker, or is practicing false tolerance.