See, first of all, if your custody agreement says anything about parental alienation. You can go to an attorney or a mediator if you need to. They can either set up a meeting or, if he is in violation of your agreement, notify him that a hearing can be held. It depends on how your agreement was set up.
And no, you don't have to read them all. I see that you have answered your own question below to say you are saving things - that's good. FYI the very best way to add info like that on Mamapedia is to EDIT your original question rather than to respond to it like all the other members. (Just click to edit your question, than add at the bottom "ETA" or "Edited To Add". You can also use the "So What Happened" section - that will keep all your info in one place for responders to see.)
His nastiness says a lot more about HIS shortcomings and limitations than about you. I'm sorry your mother has died - that was your support system. But just because you feel alone doesn't mean that you have to put up with nonsense. And just because he makes claims doesn't mean he is right. There are all kinds of people ranting on TV and the internet, but you don't let them get to you.
Get some counseling so you have someone on your side and an objective person to help you develop a strategy for dealing with this.