I find most comparisons of modern day political figures to Hitler to be loathsome. Hitler was a unique evil, who arose under a unique set of circumstances in a way that I hope will never be repeated.
My fear is ... however, that it could be. We're hearing the same rhetoric, the same scapegoating (just different groups), the rise of rightwing populism across the world and with it a concurrent rise in anti-immigrant sentiment and ethnic nationalism. Do I think that could lead to the organized cold blooded genocide of groups such as Hitler's Germany engineered? I don't think so. Do I think it could lead to discrimmination, violence towards, and the stripping of rights from innocent people or at least a willingness to look away? Yes, I fear it could.
Trump is the quintessential populist. He has that in common with Hitler. Trump is adept at managing the emotions of his followers. He characterizes the world in black and white - in an us vs them framework - with "them" being outsiders. He promises safety, prosperity, and a return to a non-existent "golden age" through him and only through him. He inspires a blind allegience that is willing to overlook flaws, lies, and gross inconsistencies. He has an immense but fragile ego that can't tolerate embarressment or contradiction, and is easily played. His personality and behavior share some of the same characteristics as Hitler's. As many populist/nationalistic leaders.
But that doesn't make him Hitler. His policies and governance remain to be seen - he is so contradictory and lies so often, it's impossible to predict. I've not seen sustained hatred towards any particular group. I don't see anything approaching Hitler, nor do I see it in our society. Unlike 1930's Germany, our economy is going great, our unemployment low. Populists usually seek scapegoats but they seldom become mass murderers. Hitler, like Stalin, and a handful of others are rare. Comparing Trump to them is a huge insult to the many who suffered under their regimes.