Oh, go look up what people wrote and did back then.
Speak from history.
I read that too. Not often. Far more often, we received compassion, sympathy, empathetic outrage, and support. But we took that for carte blanche for everything, regardless of what it was, and so have squandered that great groundswell of good will.
America First? Take a look at what's happening on the international business front. In 10 years, with our deficits and our education lag and our oil dependency and our closing borders and our host of other problems, we'll be lucky if it's America Twenty-First. Putting a bossy loudmouth in the UN will not help us build the relationships we will need to maintain the assumed "American advantage".