Then challenge it, simple as that

. So far I didn't find any challenging notions in your posts apart from the fact that at the end you might even ask from me to count Anders topics for you - which is not going to happen. It's not the matter of 'I like his character or not' and I was clear about it, tis just phenomena of people perception and reaction to certain acts... let me be more clear, have patience more even tho it's getting tiresome for you.
For instance, people are not discussing decisions like letting Castillon go even though in a bit longer term that very decision may be greater crime than blowing up the chantry. Just think about it, Castillon got his papers back, no proof against him, City Guard didn't see it and how many people will get snatched, forced into slavery and die either bled out like Oriana's father or just plainly die 'cause of hard work and starvation... and what abut their children, death count can rise up to be really huge... but there was no big explosion, it is a silent deed and by default many accept it as such. Many condone it 'cause of very personal reason - but Isabela means more to me than some random joes out there. There are no topics that actually discuss that problem, that choice and why? No extreme fireworks were up and we're kinda used to Isabela's philosophy of living - tis life gray, glorious and full of diversity.
Tis same issue as Leo Tolstoy pointed out 130 years ago in his novel Anna Karenina - countess Tverska (sorry if I spelled it wrong, never read English translation of it) is accepted in society, even made a guardian for little Sergei Karenin even tho she has many lovers and her husband has mistresses, but for the world they live together and they keep quiet about their marriage. Anna Karenina is condemned for the same reason, spurned from society - she has only one lover but she dared to say it out loud, to show it - nevermind that her intentions are honest, tis about love, she has dared to do something that was unimaginable in that society - she declared it publicly in times when it was considered a mortal sin.
So, that's why I say that Anders is very successful character - all of 'em have bigger lot of deaths on their souls but that didn't hit the nerve 'cause it's done 'along the way'. But blowing up the chantry is something that is open admission and a reminder to recent decades and that hits the nerve. BW with him hit the nerve and even tested us as players. If you don't trust me, trust Varric when he says those famous words to Anders after Dissent:
* Varric: Oh, cheer up, Blondie. You're making me cry just looking at you.
* Anders: Don't.
* Varric: You made a mistake. It happens.
* Anders: I almost killed a girl.
* Varric: You've killed two-hundred and fifty-four by my last count. Plus about five hundred men, a few dozen giant spiders, and at least two demons.
* Anders: It's not the same.
* Varric: Why? Because this one you feel bad about? Maybe that's the problem.