As I point out to my students every semester, murder is already illegal, but there are profoundly good reasons for passing an anti-lynching law at the federal level. Before dismissing the need for new laws (and these are straw-man laws in your piece, since you've discussed no actual proposed laws / provisions), it would be useful to consider whether defining the set or combination of actions taken by these domestic terrorists under a new rubric would be more useful in detecting/preventing domestic terrorism.