Because the US military would totally go out of its way to hunt down and shoot any person who made a mean Twitter comment about them, especially one that nobody noticed written by a random, anonymous US citizen wearing bunny ears in his profile pic and quite possibly living long-term in his mother's basement. /s
This is the most paranoid take on criticising the US military I've ever seen. Does the Guinness Book of World Records take submissions for this category? If so I suspect this submission ... would not even be in the competition because there's probably a hundred dumber ones out there already.