People being friendly and hating or plotting to kill each other is the way of the mob.
Stanfa made Joey merlino and Mikey Chang at the same time they were trying to hit each other..and gotti had sitdown dinners at martenellis seafood restraunt with castellano and joked and laughed with him and Gallo and Frankie d and then murdered castellano...being friendly and then plotting on them is the way of the mob