I don't think you'd get very far with such a definition for any other -ism. Moreover, we do things like attempting to wipe out entire organisms (e.g. malaria m

I don't think you'd get very far with such a definition for any other -ism. Moreover, we do things like attempting to wipe out entire organisms (e.g. malaria mosquitoes) simply based on what the average one does, whether or not any particular mosquito would have bitten a human. So you'll have a hard time unless you add lots of special cases to it.