Before you go accusing others of mental health problems, I advise against repeating lies that you've heard on the internet or at rallies without any idea of what's actually happening here on the ground, or having even a basic understanding of the history of this region.
I warmly recommend listening to some of the Palestinians themselves. I would start with the "son of Hamas", Mosab Hassan Yousef, or West Bank Palestinians like "Ali", before becoming a mouthpiece for the real oppressors of the Palestinians.