In my short life, I've supported the right of many people to say shit I disagree with. Even pretty awful, disgusting shit at that. How come I'm able to draw th

In my short life, I've supported the right of many people to say shit I disagree with. Even pretty awful, disgusting shit at that. How come I'm able to draw the line at "supporting an unjustified genocidal war, the invasion and killing of my neighbours, and the destruction of their homes"? How come I'm able to see the difference between "freedom of having and speaking opinions that are contrary to the mainstream's", and "freedom to want to murder innocents"?