You don't keep conspiracies secret by keeping quiet, you keep them secret by burying them in confusing noise -- plausible deniability. This is why we have crazy

You don't keep conspiracies secret by keeping quiet, you keep them secret by burying them in confusing noise -- plausible deniability. This is why we have crazy stories about flying saucers and people still believe carrots improve your eyesight. The truth is out there mixed up with all kinds of half truth and bullshit. Radar is arranged to create overlapping coverage and handle planes flying weird courses (and switching to secondary targets and flying home). It's possible the US knows Pakistans air defence grid so well that it could pull this off but it wouldn't be because their radar is pointed at India. Governments claim incompetence to cover up stuff all the time. "We lost those records." Suggesting that the Pakistani government is incapable of doing this is silly.