the boy scouts were discussed in another thread. "I'm sorry if you're upset" is not an apology, it's a passive aggressive attack on the person to whom it is addressed.
As already stated, the addresses by FDR and Truman to the boy scouts were highly politicized. I haven't looked at the other addresses to see their contents.
FDR for example ranted that
“When you go out into life, you have come to understand that the individual in your community who always says ‘I can’t’ or ‘I won’t’ or ‘I don’t,’ the individual who by inaction or by opposition slows up honest, practical, far-seeing community effort, is the fellow who is holding back civilization and holding back the objectives of the Constitution of the United States."
as I said in the other thread,
this seems to be the 1935 speech, and is an attack on those opposing FDR's "new deal" legislation, which brought socialism to the US under the pretext of ameliorating the great depression caused by the federal reserve. fdr is referring to his new deal legislation as "honest, practical, far-seeing community effort"
in addition to conservative opposition in congress, the supreme court blocked much (most?) of the legislation and led to the unsuccessful court-packing plan of 1937
The Four Horsemen of the Apocalypse (an epithet given by the liberals) were four conservative justices of the U.S. Supreme Court who for a short time, between 1933-37, held back the unconstitutional programs of FDR’s New Deal from becoming the law. Liberal Democrats so hated these four men that they enflamed the people to hang them in effigy.
Can you imagine what would happen today if conservatives hung liberal judges in effigy or president trump referred to the liberal wing of the supreme court as "The Four Horsemen of the Apocalypse"
same thing with Truman,
Truman's 1950 speech seems to be an attack on the isolationists in the republican party at the time (Robert Taft lost the 1952 republican nomination to Eisenhower). Truman was building cold war alliances (like nato) and laying down cold war trip-wires. And fighting the korean war
Truman's successor Eisenhower warned us of the dangers of the military-industrial complex and said something along the lines of (in the 1950s) that if we still had troops in Europe 10 years later, there was something seriously wrong. That was 60 years ago and the troops are still there.