Some things never change.
50 years ago, that sticker would have had a sickle with a small hammer, instead of the moon/star, and a couple of other small changes; and you wouldn’t have been able to convince its owners that such coexistence just wasn’t possible, either.
Even when they’re getting a bullet in the back of the head while kneeling next to a ditch, or having it sawn off, they still won’t admit that they were wrong about the belief system involved, but simply blame it on “a few misguided extremists.”