Hitler could have possibly be stopped prior to becoming a ruler by political means, though that became harder and more harder as he gained much popular support, and the dysfunctional Weimar Republic made governing extremely hard for those who were not willing to be in the Nazi party, which is basically how and why he finally became ruler.
Once Hitler became dictator , he was not hesitant to use force to push the Reichstag Fire Decree and then the Enabling Act, which were the last nails in the coffin of the Republic. One might argue that these acts could have been stopped politically, without the use of force, but I doubt it, as again, the Nazis used force to legislate them in the first place (some claim that they were even behind the Reichstag
Once Hitler became dictator , he was not hesitant to use force to push the Reichstag Fire Decree and then the Enabling Act, which were the last nails in the coffin of the Republic. One might argue that these acts could have been stopped politically, without the use of force, but I doubt it, as again, the Nazis used force to legislate them in the first place (some claim that they were even behind the Reichstag