have you even seen the other works of these guys, the series made before arrivals ‘dajjal the antichrist is reptaile’ clearly mentions shia are real islam.
as for the caliphs mentioned in the arrivals it wasnt their in the original version and was added after when there was a backlash on them and they were forced to put it in.
the series was good untill the shia doctrine took over, but you should watch age of dajjal which is way better and more eye opening,