We can comment on your question by stating the following: 1. The Imamate of the Imams (peace be upon them) has been legislated by Almighty Allah for people to observe. Every Muslim must obey all that has been proven to be divinely legislated obligations without considering the immediate benefit of the law on his everyday life since believing in a religion is believing in all what is proven to be part of it. 2. Believing in the Wilayat of the Ahlulbait (peace be upon them) is following them and observing their teachings. This has a great effect on the way a believer deals with day-to-day matters based on the teachings and the guidelines that originate from them. We can see that amongst the characteristics of the followers of the Ahlulbait (peace be upon them) by which they are known today is their condemnation of terrorism and tyranny against innocents, especially children, women and old people, and this is not but a reflection of their attachment with the humane teachings of the Ahlulbait (peace be upon them).
Although it is not obligatory to treat the grandparents in the manner one should treat the parents, and the strong ties that one has with his parents may not be with one’s grandparents too, there is no doubt that one should deal with the grandparents in a good manner.
It is permissible to work in cinema theatres if the work is permissible, such as serving lawful food and drinks, and such work.
If the machines and the instruments are keeping the heart beating and the blood circulating, then it is permissible to disconnect them. If they are helping the heart in such a way that it would continue to beat when the machines are disconnected – although with difficulties and weakness – then it is not permissible to disconnect the machines. It is not obligatory to continue treating the patient in the first case and it is obligatory in the second case.