Salam br UKBAZ I am myself from a similar background yet some of the things you have mentioned go beyond the pale of what is acceptable and what is not. A lot of the maulvis and scholars I know are trying to tell people to stop superstitions and stuff like doing sajda at the grave but people believe that as long as it does not make them kaafir they will carry on doing it. I think a lot of the time peoples reasoning is that as long as they do something which does not completely take them out of the fold of Islam then they will more likely do it. Educaiton is the way forward. What I suggest is not to get angry at your parents, but try and spend more time at a local masaajid and perhaps ask a reliable maulvi saab on what somone should be soing in a situations that you mentioned.