Again usually means that there was a first time. The conversation as started in this post didn’t have the context that you just said it did. I’m guessing you happened upon the same user and continued a conversation from a different post?
To clarify when you said “Give me a proof about the results of your method and I can consider its benefits towards the common good” was that the impersonal your or was it addressing me?
“How can you (correctly) say that what the Canadian government did with its Inuit population was wrong but, at the same time, also state that social services need to exist?” the spectrum of options between providing social services in any capacity to physically and sexually abusing children forcibly separated from their parents and even killing them is so wide that your question doesn’t deserve an answer. Try again and try better.