Man's history has involved overcoming hurdles and sometimes the tools used were killing. Yet man's has also created things, buildings, art, machines, and even creatures. Yes, man has killed things not like himself and yet he has also killed those like him. The story of Cain and Able where brother killed brother is also echoed in the American Civil War where brother killed brother.<quoted text>
For the love of God? For most of man's history, that has meant "kill anything and anyone that is "not like us".
It can be said that man has responded irrationally in the past and yet with the idea of the climate changing there are those like yourself who have responded irrationally by claiming it should not and man should act to stop it from changing.