That's really what is key. Zero has a long list of identifying marks. So much so that the writing is not only on the wall, it's written in all the languages of the world: speech, manner, action, fruits, signs (flies, mice, falling seals), etc.
He was channeling his inner Esav-Amalek when he scrawled that threatening omen *in red* on the 1 WTC beam.
"We remember. We rebuild. We come back stronger". Typical misdirection and slight of hand with the language. He knew that most would have seen "We" and thought it meant " We The [American] People".
What you saw in the SS number wasn't mathematically correct, but the error is moot.
Way back when, what did the liars put on the SS cards? Something like, "Not to be used for identification".
Now we know why.