If Obama is lying, one lie is no worse than another. In trying to insult Obama, you are lying in terms of the picture that you have “doctor”ed. What makes your lie any better than the one you claim he is making?
Um… you don’t seem to have thought this through very far. A reasonable person would never even imagine that I was claiming that Richard Nixon, circa 1970, had actually said “gobama”. It’s not clear what the “lie” would be.