In the past I have felt anger towards 'God.' But as the original quote points out, it's not possible to be angry with a god that doesn't exist. So once I realized the god of the Israelites and the god of the Muslims was invented by man, my anger vanished.
To clarify, I don't believe in the god of the bible, his superhuman son, or even Superman himself. This does not mean I have ruled out the possibility that the universe is aware of its own existence and evolves intelligently. Whether that amounts to 'God,' is for all you 'God squad' experts on the forum to access.