If you don't think some of Bill Gates money has ultimately funded rapists, illegitimate human rights groups, bio-terrorists or flat out terrorists, against Bill Gates' will or choice, even though his organization does practical due dilligence, then you live in a fantasy world.
Let’s put it this way then, would you donate to an organization with gay or lesbian in its name?
As to Bill Gates, I’ve just read that, as of 2013, his foundation has stopped funding Planned Parenthood because of abortion. I am pleasantly surprised. I would be equally surprised if he donated to a group with the word terrorist or rapist in the title.
It’s always possible that one’s donation might be go somewhere unintended, and I would never fault anyone for that. When I donate, I pray that God will guide the money to where He wants it to go. I trust in Him, not in people.