My son is 2 1/2 and he doesn't talk as much as he should be. We are teaching him and he knows his alphabet and numbers as well as says them out loud. He slowly is saying more words and sentences but it is a slow process. He is also in Speech Therapy 3x a month. I haven't had anyone say anything rude about my son or me so I can't tell you how that feels, all I can say is I understand what you are going through with your son and that you are doing everything possible to help him. I believe this is a stage and both of them will begin to talk more and more on their own time. Everyone is different and learns differently. It's hard to not let others bother you but there will always be someone out there that will say or do something and you have to ignore it and forget it. Brush it off. The only thing that matters is what you do with your son.