There are ties it’s best to save your breath. It all depends on the people you are dealing with. I don’t believe it’s necessary to be rude but being polite doesn’t mean to start a conversation. If 3 out of 4 (below exist) it’s best to keep that mouth zipped.
(1) The person you’re talking with has taken parts of your remarks to make themselves look good and you bad.
(2) This person truly doesn’t care what you’re thinking about.
(3)This leader has led his/her group without a true interest in those that they are serving and instead has done everything just to keep the power they have.
(4) This individuals consistently works with those that are opposed to you or your ideals.
Let them come to you (Fidel & Raul) with some chips in hand before the conversation begins.