these people should read the link. Its a fascinating piece of history. If one had that native history one could understand a little more why they might persecute Christianity a bit more strongly than other religions.

None of that in any, shape or form ever seeks to justify it. Just understand it.

If you disagree with the justification, it would be better to explain that position. Otherwise it appears that you are starting from the premise that this is bad so any justification presented must necessarily be dismissed regardless of validity.

I don't think it's a justification, it's a contextualization.