You need to learn what the foreign military threats to America are, think Russia and China.
A nation doesn’t stop paying attention to foreign threats because it also has domestic issues.
When the national threats are far more threatening to our domestic well-being than the foreign threats, you sure as hell better focus on your own country first, because you won't have a country left to protect yourself from those foreign threats if they get to your shores. You ignore what is going on in this country at your own peril.