"So when they say what they judge negative emotions such as anger or hate will block us is this wrong? "
I would say you be your own judge of that. When you hate someone dose it really make you feel good to have those thoughts. I have found that people who are mad at me for some reason or another. Fester up all this emotion and I am not even aware that they are mad me.
So If there is a payoff to being mad at someone, Do It if you like.
