No, Christians should not have a visual representation of Jesus because he does not exit. That name was derived just 400 years ago by the Catholic Church. Prior to that time there was no J in the Hebrew language so therefore it couldn't have been his name. Yeshua ,is the Messiach and the son of Ya and there are no representations of him available only the false white Jesus created by the Europeans.
No, it isn't needed or part of the religion, per se. It is artwork representing the Last Supper. If people want it that is fine for most. Some Christian groups would find it to be going against the religion if everyone had one because it would be a form of idolatry, which is prohibited.
There is no reason that every Christian should have a visual representation of the Last Supper in their house. Perhaps they don't want a reminder of that particular part of his life. I think it is ridiculous to think that you need to have a particular symbol to believe in him.
No, all Christians do not need to have a visual representation of the last supper in their homes. The way that they follow their religion is completely up to them, and the things that the have to show their religion is also up to them, we can not judge them by what they have.
The art that is displayed in your home should be a personal decision. Your religion should not dictate what you display in your house. Whether or not you have a depiction of Jesus' Last Supper in your house should have no impact on your religious beliefs. Christianity is founded on the belief that Jesus died and rose again to forgive people of their sins, and that belief has nothing to do with what art is hanging in their house.
No. I do not believe that all Christians should have visual representations of Jesus' Last Supper in their homes, because that would be a sin. In the bible it says that believers of Christ should not have any wooden, or graven images to worship. You don't need a picture believing should be enough.