Day Questions

I live in the West and there is always confusion as to whether it is permissible or prohibited to eat pizzas made by non-Muslims and baked in their oven. Can we eat it or not?

If it does not contain meat, then it is permissible to eat, provided that it is not known to have come into contact with anything Najis. If it contains meat, then it is not permissible to consume it in non-Muslim countries unless there is sufficient evidence that the meat is from an animal that was slaughtered in accordance to Islam.

Can I make up missed prayers instead of the nawafil before and after the obligatory prayers?

It is permissible to make up lapsed prayers instead of performing the nawafil (supererogatory) prayers.

I have heard that it is prohibited to cut ties with one's relatives. Is that true? Does this also include relatives who have left Islam, or mock it and its followers?

It is permissible to communicate with such people because there is a possibility that they might come back to the right path as a result of such ties. However, in some cases such communication encourages them to do wrong. Then, it becomes prohibited.

How can we know that one Mujtahid is most knowledgeable?

The scholars have mentioned in their treatises of practical Islamic laws the ways to determine the most knowledgeable, and one of those ways to is to refer to the people of expert (known as the ahl-ul-khibrah) who can differentiate between mujtahids and determine the most knowledgeable.