I bet those who died in the flood would completely disagree.
Of course, you seem to have a different definition of benevolent than I do.
Here is the definition I am using:
be·nev·o·lent
adj.
1. Characterized by or suggestive of doing good.
2. Of, concerned with, or organized for the benefit of charity.
[Middle English, from Old French, from Latin benevol
ns, benevolent- : bene, well; see deu-2 in Indo-European roots + vol
ns, present participle of velle, to wish; see wel-1 in Indo-European roots.]
So perhaps now you can understand how global genocide would not really qualify as benevolent?