It's true that intense bombing was done before, but the intensity of bombing in Vietnam and surrounding countries was unprecedented and some of the most intensive of that bombing was done under the command of Nixon.
To call Nixon the 'father' of carpet bombing is, of course, hyperbole, but the exaggeration isn't extreme.
The Most Bombed Place on Earth
Bombing missions of the Vietnam War
20 years of war, 7.5m tonnes of bombs, 1.3m dead: How the US razed Vietnam to the ground
It's not a problem. Tariffs are brining in twice that every month, according to Trump. He can bail them out and subsidise them and still have plenty left over. Because that's how free market capitalism works: with government subsidies and bailouts.