He says its neutral in his frame but not in the cats frame because the cat is moving with the electrons. But by that same logic the electrons should be contracted in his frame, which he conveniently ignores.

LOL then you have this comment which receives 200+ likes to "explain" this apparent contradiction:

For those who ask themselves, why the electrons dont come closer together in the lab frame: I think its because only the electrons become contracted not the space in between. Hence, the density of charge doesn't change. When the cat moves, everything it sees is contracted, since everything (also the space between the postitiv charges) moves and the density of positive charges increases. Just my approach though

Apparently space is being contracted in the cat's frame but not in the lab frame. Just complete idiocy