The murders were a deliberate assault not only on Americans but on America’s exceptional culture of reality, reason, individualism, Liberty and Capitalism including but not limited to all the derivatives such as science, technology, Rights for Women and objective law. In many public statements the San Bernardino murderers as well as each, every and all of the terrorists have declared their hatred for the culture of America and their wish to destroy it.
These values are not inherently Western or American. They are values required by human life and essential to the success of any individual or any culture. In the same way rejection of these values is a deranged philosophical/cultural system neither unique to Islam nor universal among Muslims. The fundamental conflict is not just limited to Islam and the Western culture, nor between Islam and Christianity. It is a conflict between civilization and the uncivilized.