Christians, why do some of you followers?

LOVE to tell people that they are going to burn in hell, use the same rhetorical bible verses, be harshly judged and withered in Judgment day (Today I had 6 christians telling me this!) and tell other religions that they are "false" "pagan" and judge people for their ethnicity, ual Orientations.etc? Why cant those so-called Christians just leave us alone?