His brain is grated

Consider a situation where the God is looking at the fellow who is painting this thing on the tarpaulin of the truck. Now if god is watching and the person is willing to write "God is Great" then the God should be really happy and SHOULD have absolutely supported him in all aspects.
Now my question is...what exactly was going in GOD's mind while the painter was writing this?
Whose mistake is this? the painter's? or the painter of the painter? if the painter of the painter himself has not painted the painter properly how do you think the paint of the painter painted by the painter will be good and correct?

I think GOD forgot that there is a thing called Isopropyl Alcohol commonly known as "thinner" to erase the paint.