Unfortunately, those that are put on a pedestal usually fall off with a big bang!
Your brother, sad to say, despite his religious beliefs that may preach humility and caring for others, has decided he is too good for mere mortals to be associated with himself.
Sorry if I sound harsh, but I have seen this happen several times in friends families. No contact from one member until money is mentioned!
Your father, quite rightly IMO changed his will. If his son and family couldn't be bothered to visit while he was alive, they were not going to care when he was dead. You bore the brunt of the care and upheaval to your home, willingly and even though you did not ask for a reward or expect it, your father loved and cared for you enough.
Sadly, you will have to let your brother go his own way. If you continue to try to contact him, or expect a response from him, you will be even more hurt and disappointed than you are now.
Just remember your dad for the man he was. At least you have those memories to comfort you - your brother doesn't and possibly feels guilty because of it, hence the lack of contact.