Don't read so much into the word "hateful". It simply means something disliked, unpleasant, unappealing. Like.. I find cleaning the gutters on the eaves hateful.
You'd know if I hated you.. if I said.. I hate you for smoking that cigar. Now that might be some kind of micro-aggression as you call it, but surely, saying "I think second hand smoke is hateful", is far from any kind of aggression.
Some folks just have to get over it! Now there, that's some kind of micro-aggression for ya!