Why do you think Ecuadorans chose to celebrate Ecuadoran Amazon Day although part of its history is negative?

There is so much that Ecuador has gained with Spanish invasion. Spanish conquest in Ecuador open doors to civilization of people particularly introduction of Christianity as religion. Although Ecuador suffered a lot under Spanish explorers, vast natural oil reserves and natural biodiversity of Amazon wouldn't be known. Popular destination of researchers and tourist, Amazon is now a protected area for its natives and home of different species.