If Hitler were born in our time, he would probably call his party the German Populist Party or something, and praise Putin and Trump. Goebbels would be a masterful Facebook and Twitter sower of fake news.
He presented himself as opposition was to Globalism and Internationalism and everything else that could be deemed degenerate or non-German. Communists and Jews fit right into that. Mind you, back then the Jewish people weren't about a Zionist state praised by Evangelicals, but were perceived instead as some sort of Globalist Elite.
In some ways, as well, he longed for a return to Germany's Imperial ambitions, so he shared a certain anti-English and anti-French sentiment. Socially, he was well into what we call right-wing nowadays. Economically, he was a totalitarian statist. Much like Le Pen, he would be 100% called a member of the far-right or a right-wing populist despite these statist leanings.
No one in their right mind would call him left-wing, by the way, except for die-hard anti-communist populists on the right. Even those obviously know they are lying, and on all likehood have positive sentiments toward Hitler and his ilk.