Seriously. You guys have been so warm and welcoming to him! I can't believe that he lost patience. After all, it's only required that he have an open mind right? No one else on the forum should try to return the favor.
Cancer cells are frequently used for research and virus propagation. This is nothing new and nothing sinister. Cancer cells have the ability to reproduce endlessly, making them perfect for this purpose.
Stem cells are great for this, too. Unfortunately, politicians with their heads up their you-know-what like to block stem cell research.