Are you actually arguing that they have not believed people can be evil?!? goodness, man, they are believers in the Bible and the Bible clearly teaches that men can be evil. It seems your real argument is with the Bible, not with me.
As a matter of fact, when did they use the term to describe anything other than a system of government, or a political ideology?
Just some philosophical background: non-personal things/entities are not evil (notwithstanding the leftist view if guns). Evil is predicated of moral agents (i.e., persons). So, even though we often speak abstractly of evil "governments". "political ideologies", etc., we are really referring to beliefs, actions, etc., of moral agents.
Reagan and Bush understand this.
Reagan and Bush do not consider their political enemies to be evil. RR was friends with many of his opponents and W is the same way.
They are smarter than you clearly, because they understand that calling your political opponents evil does nothing but turn people off from your message.
I asked you a very simple question: when did Ronald Reagan ever call a political foe "evil"?
When has Dubya done so?