And conservatives interpret the Constitution whichever way suits theirs. The Constitution is somewhat like the Bible. There are varying ways to view it, and some people take stricter views than others. Also, ideology largely determines what parts are taken more strictly than others. Conservatives tend to be loose in their interpretation of the 2nd Amendment so as to include individuals as having the right to bear arms and not just militias, while taking a more strict interpretation of other parts like the 14th Amendment. Liberals will often do the reverse.