A lot of resentment Christians have for atheists probably comes from the reason that Christians have to waste a lot of time on their religion, be it sitting at mass, believing in absurdities, or making offerings, while atheists don't have to do any of that and get away without any consequences.
teachings of the Bible are so muddled and self-contradictory that it was possible for Christians to happily burn heretics alive for five long centuries. It was even possible for the most venerated patriarchs of the Church, like St. Augustine and St. Thomas Aquinas, to conclude that heretics should be tortured (Augustine) or killed outright (Aquinas). Martin Luther and John Calvin advocated the wholesale murder of heretics, apostates, Jews, and witches. - Sam Harris, "Letter To A Christian Nation"
