The parent asserted that Nazis are evil. While I'm sure there is a range of behaviors that constitute "evil" I don't think a drone assassination campaign in any way compares to the deliberate and systematic attempt to remove all members of certain groups (i.e. Jewish people, among others) from Earth.
And that parent was using Nazis to disclaim the US as evil. The US doesn't just get off the hook because they haven't resorted to genocide.