If you read this, please, don't imagine me with a frown, I really took time to think and awnser with tenderness :p
I think it's important to separate imperfect christian humans from Christ Himself, kinda like you did, but not really. Christianity doesn’t seek a “monopoly on morality,” but rather points to an objetive moral truth that exists beyond any individual or culture, God is Truth. That's not a monopoly, like a company of cakes trying to kill/buy all the other companies of cake, but rather just natural hierarchy. If there is a "god", and you can think of a more perfect "god", the last one is God. If you can think of a bigger "god", that is God. The same goes for truth, love, etc. God is at the end of infinity, and somehow, also at the start, all Glory and all Humility. When a Christian talks about truth or morality, it’s not to control others, but to witness to what we believe comes from God - who is Truth itself, Love itself, Law itself. And sometimes some of us can be harsh.
But sometimes yes, you should expect to be called evil, if the person you are talking to have a worldview that has very clear notions of good and evil, and your view, for one reason or the other, aligns with the evil category, or relativizes truth/moral for that person, that person will call you evil (with politeness or not unfortunately). But disagreement isn't the same as condemnation. We also believe that wrongs can be forgiven, and genuine faith should always be lived with charity and humility. God hates sin, not the sinner.
And thinking of God's infinite mercy, pope Francis said one time "What I am going to say is not a dogma of faith but my own personal view: I like to think of hell as empty; I hope it is". And I, hope that you maybe understand christians a little better, I don't expect to make you love us, but I hope I helped you understand us.