All protests about football are pretty sad, including the one last season.
A lot of football clubs are huge parts of the local community, and give 1,000s of people a reason to feel connected and even have reason to be alive.
Some owners come in and risk wrecking that, simply trying to asset strip the club and make a quick profit.
While United are strong enough to cope with the Glazers behaviour, there's many recent examples, such as Bury, of a rogue owner ripping the heart out of a community.
So while you may sneer at protests as "sad", football clubs do matter to quite a few people.