text: What is a "litmus test"?
  
  A "litmus test" is an issue that someone else cares about, that you don't care about.
  
  So, when you call being pro-life a "litmus test" you are merely saying that chopping up babies is something that just doesn't bother you.
  
  As for that tired old "hunger and thirst for justice" stuff? Well, that's so pre-Vatican II, isn't it?