Your argument would be valid if Trump was going to be in office for 10 years, but in 4 he will be gone for good. There is no legitimate reason to believe that there is anything Trump can do to maintain power once his term is over. Trump almost certainly isn’t going to kill 6 million Jews or any equivalent in 4 years, the only way these parallels continue is if the American people decide for them to continue, irrespective of Trump.