False equivalency poisons discussions. Saying Phil Robertsons congregation has killed people is an outright lie and vicious slander.
By the way, non-religion has done a pretty good job of killing people in the last 100 years (see: USSR, Nazi Germany, Red China, Cambodia, etc.).
The Atheists in power in the Soviet Union killed 20-50 million people, depending on who you are reading. The Atheists in power in China killed 50-100 million people, again, depending on who you are reading.
Suffice it to say, Christians are pikers compared to Atheists.