These folks halfway across the world aren't bothering, nor do they actually threaten my freedom in any way shape or form.
As a counterargument, you can't know that. It seems like this argument could be restated as "I don't trust the US government to dispassionately determine who is a threat and even if they were a threat I am not in favor of killing people as a response." Which seems fair but the world is a complicated place and there are justifiable uses of drone strikes.