They fell away from Jesus Christ and in His own due time, he had them swept off the land by other people. Worshipping Mother Earth and praying to different gods of earth does not qualify for pleasing God. It qualifies for losing the promised land. Finally, you mention many innocent people that died in the cause of Jesus Christ. This is different than being a victim of murder or war against innocent people.
Martyrs often give their life willingly for their cause.
Martyrs could often forsake their faith and usually live. They can often flee the danger. They could deny the Christ, and ususally live. This is a very different thing than what took place in WW II which had nothing to do with standing up for your testimony in Christ. I see satan in it.