Another argument is that Judah betrayed Jesus due to a bag of silver coins. However, after that, he was very regretful for his behavior and finally committed suicide. In order to punish him, god turned him into a vampire, who was immortal, lived in the darkness, and would always be lonely.
小说《暮光之城》看吸血鬼文化的演变(3):http://www.751com.cn/yingyu/lunwen_56949.html