No one is 100 percent certain of the number of people who died in World War 2 but it experts believe the figure is around the 50-70 million people killed in as a result of World War 2. It can vary as to were you look, as for example
Wikipedia has a great article on how many people died in world war 2 World War2 which leans towards the scary figure of 72 million people.
No one has died because of the Bible, what people have died for is Adamic sin brought upon us all with our first human parents being unfaithful to God, which is why we await the coming ransom sacrifice of Jesus to be fully applied. Also Satan has been thrown to the Earth and is responsible for the death and problems we see currently - see Rev 12:9 &1 Pet 5:8. Did you know that the Bible says it is for only our own good - 2 Tim 3:16? Also did you know that the Bible states that nothing bad can be attributed to God - James 1:13? Be assured that God sees all the wicked on the Earth today and can resurrect anyone that has been unjustly killed or has died as a result of there zeal for his word. The Bible states that after God has removed the wickedness from the Earth Psalms 37:9 that the meek ones will possess the Earth and find delight in the abundance of peace - Psalms 37:11