Every action by the Feds does not have to be mandated by the USA. The formation fo the Federal Banking system shortly after the founding of the USA, for example, was not mandated by the USC and would fall within 10th Amendment concerns you mentioned, yet clearly it's (necessarily) not an unconstitutional enterprise (and a pretty smart thing to do, of course).
To be fair, those arguments that it would be ubnconstitutional for numerous reasons were made at the time and they failed then and they will fail now.
You are partially right in your answer - you really DON'T know where to begin! ;-)
It is that attitude that has allowed socialism to get it's foothold here and, while I don't claim to be a good loser, your side has won...but I don't have to respect you for it.
Yes it does. "WE" have allowed the politicians to run roughshod over "our" rights for WAY too long and "WE" are the only ones to blame. This has produced unconstitutional "departments" such as energy-that has never produced any, and education-that has never educated one child.
Col. Crockett's "Not Yours to Give" is quite applicable.