Our strength is also our greatest weakness. Our electrical technology is developing in leaps and bounds but in this country we still have a fragile electrical grid. Our electrical technology is susceptible to EMP threat.
Meanwhile, with noted exceptions, we've become more and more dependent on everything electrical. Take it away in a strike against our electrical grid and people, other than survivalists and preppers, are in deep trouble. Power outages, food delivery slows or stops, planes can't fly, modern cars can't run, hospitals can't treat. A living nightmare. Business is halted unless someone has cash or something to trade as electrical transactions cannot be made.
Contrast that with a sasquatch who will find an EMP attack just another day in the park. Whistling as it watches little people scream and cry for help.