Is he able, but not willing?
Then he is malevolent.
No. It is not a non-sequitor at all. However, I will note your inability to answer it.
You would have to argue why the conclusion follows from the premise.
I can think of another reasons why God is not willing to prevent evil - that has nothing to do with malevolence. Take free will. If God prevents me acting in an evil fashion when I want to then he would be constraining my free will to do so. His reason for not constraining my free will is not based in malevolence but in a desire to permit my free will expression - even if the consequences are that I do evil.
Would you prefer yourself to be constrained so that you can do absolutely nothing wrong at all? (Remembering first that it would be Gods definition of evil that would apply - not your own
). The restraint would stretch into areas of your life: thought and deed to a degree unimaginable.
Ramoss reads an evc post where someone says the Jews in Nazi Germany had it coming and is about to get angr.... ZAP!! Thought wiped out...
Ramoss sees a pretty girl and is about to engage in some idle lus... ZAP!! thought wiped out...
Ramoss is about to criticize someones for being selfis...ZAP!! Thought wiped out...
I look forward to the day when this will be so. But would you?