1. Trump has a terribly sexist and condescending attitude regarding women. 
2. The travel ban is inherently un-American. The United States was founded on principles of hope for those who wanted to escape persecution and pursue a better life. SO WHAT if there are terrorists in those countries? Some people choose to flee them in order to pursue a better life. There can be nothing more American.
3.  Trump works for himself. America is a nation built together. Trump, on the other hand, used a loan from Dad to build one of the most egotistically self-centered empires the world has seen. 
4. Trump offered words of admiration towards Kim Jong Un (sp?) and Saddam Hussein, particularly referencing the power they wielded. If you think that's American, there's something wrong with you.
5. Trump has been making moves to create only a small faction of power in his Executive Office. This is the scariest point of all, as he is instilling authoritarian virtues as President.