Yes, you are confused. Let's simplifiy it just for you.
(Once)The tribe of Mice lived on an Island which "GOD had endowed with all the treasures of the Earth".
These wise and brave Mice had a strict rule: We will always mind our own business.
But as time went by, the wise and brave council passed away and their successors forgot the rules of the Founding Mice.
They sent forth delegations of Mice to interfere in the affairs of the Rabbits and the Squirrels over the sea and attempted to convince them that they should live as all good Mice do.
And worst of all, they set one mouse above all others as King.
And the once blessed Island of the Mice became a place of desolation.
The End
Oh, I wasn’t really confused. I was using a little self-deprecation to make the point that this is a botched political attack and the author’s writing abilities are awful. The last parable receives an F for readability and using personal attacks on an individual leader so the author doesn’t have to deal with at least the last 80 or 100 years of history. If America ever really was truly isolationist those days were gone long before you and I were ever born. Chalking current events up to the President trying to settle scores for his father is a disservice, especially to your creditability.