To put it in the most simplistic of terms, everyone involved in the healthcare reform debate--insurers, hospitals, pharmaceutical companies, patients, small business owners, etc. etc. etc.--is validly or not decrying how much of the pie they may have to relinquish. Meanwhile, the almost 50 million of us without health insurance haven't got so much as a bite. Think about it.
As for the ignorant, Fox News-fed protesters who have no clue what they are actually protesting, this quote from Bill Maher pretty much sums it up:
"At a recent town-hall meeting in South Carolina, a man stood up and told his Congressman to 'keep your government hands off my Medicare,' which is kind of like driving cross country to protest highways."