Ok. In your counter argument, what is "good"? As in good vs. evil or moral vs immoral? When you accept the existence of goodness, you must affirm a moral law on the basis of which to judge between good and evil. But when you admit to a moral law, you must admit that there is a moral lawgiver. The moral lawgiver is God. If it is not, and it is humanity itself that gives the moral law (as you and many others here obviously believe), then it is completely subjective and who are you to say your opponent is wrong/bad/evil?