I don't think nepotism is a sign of looming fascism.You're right. These features have definitely been seen in other countires theoughout history. Luckily, so far they have not occurred here in the U.S.A.
Wellllll..........except for your dynastic #16, since we must count the Bushes along with their dynastic Saudi oil billionaire backers. Along with those filthy Adams and Harrisons. Bah!!
Question: Would you count nepotism as part of #16?
It's everywhere.
And don't forget that the Clintons tried for #16, & still appear to be grooming their spawn for queendom.
We should think of signs of fascism as each not being an indicator,
but rather as risk factors which combine to become a signal.
Btw, I'd ditch #5 from the OP.