I’m willing to be proven wrong but this ad is almost certainly fake. For one the logo used in the ad didn’t exist? In the early 60s McDonald’s did have red text but it wasn’t off-center, when it was later off-center the text was white or black but not red. Maybe that’s the joke and why it was created, but McDonald’s was never this edgy. It was more commercials about mcnuggets being born to die or the weirdness of the hamburgler and grimace.
I’ve heard a saying, two things you should never do on the Internet are argue or explain. It takes up a lot of mental energy and time to do it for no reward.