The actual quote was odd in context, and means something completely different out of context.
The speech it occurred in was entirely about public service, and the quote suggested a large-scale Peace Corp, soup-kitchen, Habitat For Humanity kind of "army". Apparently the idea was to, just like the Army can drop a brigade anywhere in short order to promptly beat a government & military into submission, have a similar group that can drop in anywhere and [re]build infrastructure & social support in short order. (Some merit: in Iraq, we completed the first government-toppling process in mere days, but the subsequent years were largely due to an inability to restore order & infrastructure quickly.)
Bizzarely, the actual paragraph in question was NOT in his prepared text. No word on whether it was on the teleprompter or not. It sounds very different from the rest of the prepared text, only shows up in some transcripts, and is obviously very strangely worded given the context.
Other obvious problems aside, it shows BHO is not insightful enough to know how some phrases will come across as "loaded" to a great many people. He may have meant a big domestic charity, but it came across as US Ghestapo.