Why were Christian wars are far more deadly than Muslim wars?

The deadliest Muslim war was the Dungan Revolt 1862-1877, killing around 8-12 million people. The Deadliest Christian war was the Taiping Rebellion 1850-1864, Killing around 20-30 million people. Second deadliest was the 30 years war 1618-1648 killing 8-12 million.
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