No, a healthy discussion is perfectly ok. People may post their opinions or reviews and others may ask "why" or "how" over certain points indeed. But to call people "weird" or "sad" or to tell them to go get a life just because they don't like a certain movie or their opinions don't match with yours is, well... sad.
Btw I myself really liked the movie so I'm not saying this just because I was personally offended or something.