“Is it reasonable to misbehave if there is not a deity? No”
Respectfully, the term “misbehave” is a meaningless abstraction if there is no deity. If there is no deity then moral relativism is the closest we can get to truth. Relativism is in conflict with itself and, consequently, negates all meaning. For example, can it be both morally good and morally bad to commit rape?
If you wish to answer, please also explain why your answer should be favored over anyone else’s answer.
At any rate, the only reason it would be unreasonable to misbehave in the absence of a deity is because there is no basis upon which to reason about morality without one. In other words, it is not misbehaving that becomes unreasonable in the absence of a deity. Ratther it is the attempt to reason about morality itself that becomes unreasonable.
One thing you’ll notice about those who claim
“morality doesn’t require God” -
they always define “moral behavior” in accordance with
their own actual behavior choices.
So, by self-definition, they are “moral” people.