Nothing was "infiltrated". They knew where the balloon was since shortly after it left Chinese airspace and tracked it continously as it made it's way toward Alaska, south over Canada, and over the United States. (Is this thread being astroturfed?)
Some people have a vested interest in various US parties (the executive, the military, others?) looking inept. Some people have a very vested interested in those parties or a subset thereof looking competent. No need to spend money on astroturfing when the team politics knuckle draggers will do it for you.
Given that Trump said nothing as 3 similar balloons did the same thing but went undetected, this sounds more like happenstance that anyone knew about it this time.
