How strongly should a student object to a professor's objectionable views?

I am a senior undergraduate in liberal arts major at a public university. I'm currently taking a class with the bleak subject matter of genocide. My blatantly socialist teacher presents her views in discussions of the Armenian genocide, the “genocide” in Soviet Russia, and the Holocaust. Often, she ignores the role of religion and flawed socialist policies. Also, she blames greed and capitalism to an unreasonable degree for the woes of the aforementioned countries. How should I respond to these objectionable claims of hers? How much should I try to undermine her wrongheaded views?