Invaders did not, but good missionaries did. Many of the missionaries who came to the New World were very respectful. They wrote Bibles in the native tongue. Like in China they saught permission from the Holy SEE to pray Mass in the native tongue. They wrote down traditions and celebrations important to the native people and explained what feast days and principles of the faith could be celebrated. They ate the food without a mention of what they were accustomed to. They did not introduce the western idea of child rearing but allowed natives to raise their children without any corporal punishment…and allowed children their place in their culture that was far from the euro-centric idea of “seen and not heard”
St. Serra was a missionary, not an invader. Yet, in many ways, he carried the same issues that an invader did. He set out to erase the people’s culture, language, and traditions. What he did was an attempt to erase the history of an entire people. Now, in his time, this was pretty standard even among native tribes. He should not be judged by what we know today.
That said, the Church owes much to these people. Stripped of cultural roots many fall prey to alcoholism and other vices. Yet the church has done very little to ensure a restoration of native values.
It is completely understandable that people would be mad. They are faced with a person who represents the loss of their cultural identity, a tumble into a dark place and many other unpleasant things.