Planning a terrorist act that will happen in the US?
You mean the eyes of the US government. The citizens aren't out there killing foreign nationals. Saying US citizens are responsible for extra-judicial killings is like saying Muslims are responsible for terrorist attacks. It's wrong and it's offensive.
I'm willing to bet that no one voted for President Obama specifically because he wanted to use drones to kill suspected terrorists without attempting to arrest them first. He came up with that idea on his own. Saying the US citizens are involved with that decision is, again, wrong and offensive.
How's that defense working for an ISIS funder?
"Oh, I didn't send the money for bombs, I sent it for their work with children..."