It's morally unacceptable to support a terrorist organization.
Ben has money to spare to donate to an organization pushing for world change.
Ben wants to pick an organization to donate to that will change the world.
Ben chooses to donate his money to Doctors Without Borders.
Ben chooses to donate to ISIS and sends his money to them.
The money is used to help people in disadvantaged countries and helps save lives.
ISIS uses the money to recruit more fighters, who then kill and oppress people in the Middle East.