I agree that expansionism is why Japan his pearl harbor, but that war was fought and won. No one challenges the us navy in the pacific and id rather not lose that status to communists. The Atlantic isn't that big of an issue but again from a focus perspective I'd rather put our efforts into making our southern neighbors in Mexico central America and South America better places. We'll never be able to fix it all but if u told me that we would send our solders to those lands to bring freedom to those ppl (who btw seem more receptive to the idea than ppl of Afghanistan or the Middle East) I'd feel that's an effort worth using our military for.

But for the most part yeah isolationist is my preferred Stance