Of course he'd say this. He's in the same tradition as isolationists such as Abraham Lincoln, William McKinley, Charles Lindbergh and Bob Taft, before the Cold War made conservatives into temporary internationalists.
...what?
It's remarkable how their statures keep dropping, isn't it? Like the reverse evolutionary chart...
I'm not sure what you mean. Are you trying to make a joke? You don't really think William McKinley was an isolationist, do you?
Why not? He said he hated war, and the only one he was involved in during his presidency, he had to be dragged into by yellow journalists. The progressive Teddy Roosevelt is the one who lived and breathed the war.
"Less eager to start a war than Teddy Roosevelt" might include everyone not named Teddy Roosevelt.