These guys don't shoot very well and we have a heavily armed population. 5000 snipers we can handle. Nuke's would be another issue, but I doubt they've got 20 and certainly not in country. Though they may have a few.
How so when a single sniper brought havock and a grinding halt to the DC metro area.
5,000 snipers would have America looking like a ghost town. Virtually no one would leave their home. The country woudl shut down.