It is rather interesting to read 51 pages of posts about how Christianity is bad and brutal and how Christians are attacking everyone, how they should not exist in this manner and also how they are supposedly not persecuted after all that. It is amazing.
I can understand how some of the things said here would be upsetting to you as a Christian - I know that I've read a few things here that have made me uncomfortable, and I suspect my views line up more closely to the majority view here than yours do. I would not agree that Christians are persecuted in western culture, but some of the more hostile views I have seen against Christianity, while coming from some understandable roots, would definitely be enough to make many Christians feel threatened.
I grew up in a devoutly Christian family (in that I'm literally a pastor's kid) and while it's not a belief system I personally follow anymore, I do deeply respect the faith of my family and many of the people I know. Christian ideology has, historically and presently, been used to justify some genuinely horrifying acts, and that is something we have to acknowledge, but in the same manner I know I've seen in my own life people who've been motivated by their Christian beliefs to love and care for others and do genuinely good things.
I think many people here are reacting to the way that Christian ideology has caused Minna to act: in a way that feels preachy and unempathetic, and also goes along with her rushing of the SSSS comic's ending when it's been a story that so many have held close to heart. Just as you might feel threatened by the things said against Christianity here, many people here have themselves felt threatened by the way that some Christians have acted towards them, and it's important to keep that in mind.
The way I see it, Christianity calls people to love their neighbours and not to be self-righteous or pass harsh judgements on others. I feel that the way that Minna has written Lovely People seems to contradict these ideas with its very heavy-handed and preachy evangelism and the neglect to accurately label the religious message of the story when promoting it, as well as some of the insensitive comments she has made, particularly about race. While I don't begrudge Minna of her faith, I cannot agree with the way she has handled Lovely People. I feel that we have to ask ourselves: when proclaiming Jesus, are Minna's characters and Minna herself acting as Jesus would? Are they showing compassion towards others, or are they acting dismissive of others' concerns? Loving your neighbour doesn't just mean preaching the gospel at them, it means being considerate and empathetic. It means going out of your way to actually care.
This does remind me to say this, though: it'd be excellent if people here could please remember not to make vastly generalised statements or claims about Christianity when criticising the way that Minna has acted or claims she has made. Christianity is a very diverse religion with a wide range of people who follow it, and a wide range of interpretations of its teachings. Additionally, it is certainly not the only religion or ideology that has been used to justify atrocities: you can find extremists in all major religions, and it's factually untrue to single out Christianity as the One Bad Religion that's caused all these Bad Things when history is far more complex than that.