The Bible is full of this stuff, and plenty of Crusades, Inquisitions and pogroms remind us that brutality and murder in the name of Christianity is in no short supply. Only willful ignorance could hold otherwise. Yet, Christianity is not a bloodthirsty religion. Allow me to suggest that the same is true of Islam. Selective quote picking from the Koran is pretty unconvincing in light of this reality.
You are changing the subject from Muhammad's character to a criticism of Christianity. Islam is Muhammad; without him and what he was, there is no Islam.
Buddha, Zoroaster, Jesus and other holy men preached love and tolerance. Those who profess to believe in them have no excuse for killing and plunder. However:
Ishaq:510 “We ask Thee for the booty of this town and its people. Forward in the name of Allah.’ He used to say this of every town he raided.”
Ishaq:327 “Allah said, ‘A prophet must slaughter before collecting captives. A slaughtered enemy is driven from the land. Muhammad, you craved the desires of this world, its goods and the ransom captives would bring. But Allah desires killing them to manifest the religion.’”