As a Christian, why can't they just try to convert people to Christianity instead of attacking everyone and making our religion look bad?
They are in no way Christians. They do not teach or practice the teachings of Jesus Christ, the son of the Holy Creator.
They do not love everyone regardless of... well, anything. They hate, they don't love.
They are a cult of the Bible, AKA people who cherrypick what they like and throw away the stuff they don't like. They are NOT Christians.