I think Isolation is a major theme in this song: tonight I'm talking to myself --> turning inward to your own thoughts.
I think it's also about losing a friendship/relationship with a person over disagreement, which is why you isolate yourself --> when words come between us, noiseless in the air = disagreement; and if decisions cause divisions, tell meh who's to blame? Pick a target for convenience when there are other ways --> handling the disagreement badly by resorting to blaming and attacking another person
I think Isolation is a major theme in this song: tonight I'm talking to myself --> turning inward to your own thoughts. I think it's also about losing a friendship/relationship with a person over disagreement, which is why you isolate yourself --> when words come between us, noiseless in the air = disagreement; and if decisions cause divisions, tell meh who's to blame? Pick a target for convenience when there are other ways --> handling the disagreement badly by resorting to blaming and attacking another person