Assuming 1 carrot equals 60 grams, and the Sun is 1.9891 * 10^30 kg, the Sun weighs 3.315 * 10^31 60 g carrots. Also, as Julian weighs 157 pounds, and the Sun weighs 4.4 nonillion, Julian's weight is 3.57 * 10^-27% of the Sun.
Also, this is a crime called fitnah, to kill (or at least bully) non-Muslims because of their religion. Islam does not allow that, and the verses that may seem like fitnah are just for fighting back in these wars at the time.