Maybe not to you, but he is definitely a freedom fighter to many other people. Hitler was, and still is worshipped by a large number of people who viewed/view Hitler in a very positive light and would wholeheartedly disagree with your description of him.
Afterall, one man's genocidal maniac is another man's freedom fighter and hero.
The same argument could be made for Stalin, or Idi Aman, or Saddam Hussein, or Kim II Sung, or Pol Pot, or Mao-Ze-Dong. All of these people engaged in pointless massive killings, but are still worshipped and revered by many people.
Clearly there is a difference in opinion with the rest of the world.