If you read their statement carefully, you will see that what you have said here is not accurate.
Amnesty said that the problems in the settlement did not constitute violations of human rights that "None of the material AI has received contains evidence of abuses which fall within Al's mandate for action — such as grave violations of fundamental human rights including torture, the death penalty, extra-judicial executions, arbitrary detention or imprisonment, or unfair trials."
emphasis mine.
Noone was alleging that these were taking place, so actually amnesty simple said "We are not the right persons to asses whetehre or not religious persecution and banning are taking place, and monks being harassed, denied civil rioghts, etc."
They were essentially saying "we're staying out of it."
A.I..... "While recognizing that spiritual debate can be contentious, Amnesty International cannot become involved in debate on spiritual issues. "