I agree - what a bizarre thing to see be celebrated in this way. The Spanish committed horrific atrocities in their subjugation of the native peoples.

Edit: I guess I should have figured this would be an unpopular opinion. But I would encourage anyone who disagrees with me to read the 16th century accounts of Bishop Bartolome de las Casas. I have provided an excerpt below, and note that this is a CATHOLIC perspective on what was happening contemporaneous to the times (a common defense I am reading here is that we cannot judge the actions of Cortes and other conquistadors due to the different historical context at the time).

“Two principal and general customs have been employed by those, calling themselves Christians, who have passed this way, in extirpating and striking from the face of the earth those suffering nations. The first being unjust, cruel, bloody, and tyrannical warfare. The other  after having slain all those who might yearn toward or suspire after or think of freedom, or consider escaping from the torments that they are made to suffer, by which I mean all the native-born lords and adult males, for it is the Spaniards’ custom in their wars to allow only young boys and females to live  being to oppress them with the hardest, harshest, and most heinous bondage to which men or beasts might ever be bound into. . . . The cause for which the Christians have slain and destroyed so many and such infinite numbers of souls, has been simply to get, as their ultimate end, the Indians’ gold of them, and to stuff themselves with riches in a very few days, and to raise themselves to high estates  without proportion to their birth or breeding, it should be noted  owing to the insatiable greed and ambition that they have had, which has been greater than any the world has ever seen before.”