America was established through violent militancy, so I don't understand the first point. Many great conflicts have proven that as a viable solution.
The second point makes many people uncomfortable because of the NOI's vocal opinions of the white race as a whole. While the "white devil" philosophy can be supported with case studies of deplorable acts against blacks, such as slavery, Jim Crow laws, segregation, lynchings, to name a few, it was and is a gross exaggeration that is becoming less and less supportable. Malcolm X, later in life, experienced a different side of whites and race, that later led him to shun those negative beliefs.
I admire him for his zest for learning, and his courage to have a militant position in a time of great injustice. I was born in a much better America, and have still faced racism that made me feel worthless, defenseless, and angry -- but I still hesitate to even call out racism for fear of negative reprisal.
While I don't think you or any contemporary "non-racist" white person is responsible for those acts, denial of the past and its lingering effects, and hatred for those who fought to end it doesn't help. Without the fear of violent revolution, I question if we would have progressed as far as we have.