@momoends,
Momoends, you are completely ignoring any facts that don't support your narrative.
Let's start with what I think are undeniable facts.
1. Isabel was the monarch and held the considerable economic and political power of the Spanish colonial empire.
2. The conquistadors were stealing land, comitting brutal acts and taking people slaves were working at her command. She was giving the orders and she was profiting from it.
3. She was brought back slaves. These were human beings in chains that were taken from their homes by force and the she considered her property.
4. This meant that she knew that human beings were being robbed from their homes by force and used as property and that she was participating and supporting this practice.
Are there any of these facts that you dispute?
After we establish the facts, we can then get into a discussion about whether the practice of slavery, or Isabella's participation in it, was evil or not. This discussion will be more subjective (evil is a subjective judgement).
But we can't have this discussion unless you accept the objective facts first. It doesn't seem like your political bias will allow you to do this.