My analogy to begin with was simply a turn-around on your analogy to another poster. So if it was a Wookie defense it was no more so than yours was. Those who think the federal government was correct to step into the Shiavo case are not the ones claiming an all-or-nothing position.
Conservatives are for state's rights. Some of us also recognize that states have to be kept in check from time to time and are not separate little countries when they want to be and part of the Union only when the goody-bag is opened. States don't get to redefine murder or decide not to punish it.
Actually they do it all the time. For example a number of states have defined murder as including the murder of a viable fetus. Prior to those laws such acts were legal. If they repeal these laws, such killings will again be legal.