I don't know man, I've seen plenty gimmicks of that kind over the years... there's just something off about SMM.
I was the first to speculate on this "off" thing months ago. You're right it's quite striking.
It is autism.
Autistic people cover a wide spectrum of behaviour because autism is a wide spectrum of a developmental disorder.
Hence, let us not think that every autistic person is as obnoxious, rude, antagonistic and apathetic as Pedro Coderch aka suckmymuscle.