Why is building 13 unlucky?

13 it is unlucky to learn western Christianity. It is said that Jesus had twelve disciples, one of whom was Judas, and Jesus was betrayed by Judas for thirty pieces of silver. At the last supper, Jesus had dinner with all his disciples, one of whom was thirteen years old. At the dinner, Jesus said that he was betrayed by his disciples and was going to die, so western Christians taboo 13. And because that day is Friday, if the number 13 happens to be Friday, it will be considered particularly unlucky.