I dont understand one thing thou, why is purging strathholm is considered evil by almost everyone ?
what other options did arthas have? he could ignore it, wait until everyone is turned into an enemy soldier and then attacked, or could go and save people, which by no means he could tell if someone is infected or someone is clean, which could result in spreading the plague to other cities as well.
or he could do what he did, and with some acceptable casualties purge the city, prevent it from turning into an army for the enemy.
I understand the act of killing innocent people is evil, but what other, better option did he have beside doing a necessary evil everyone were too afraid to do ?
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imagine the ragefest by sylvanas fans if/when that happens!
tbh, I would LOVE to see such thing happen, not because I dont like sylvanas or anything, because its poetic!