It is very frustrating for us not in or from the USA to hear things disparaging things about socialism becasue we keep saying to ourselves: "why don't they get?"
Because the Republican party puts money first and people second.
Average Joe followers of the Republican party tend to have a deep personal connection with that party that defines much of their identity as a person. They tend to be older, empty-nesters with high-income, white-collar jobs.
For many, they wake up to Fox News in the morning (a right-wing news media outlet) listen to conservative talk radio (e.g. Rush Limbaugh) in the afternoons and come home from work to watch more Fox News programming until bedtime. This is not an exaggeration - many people I know personally live like this daily...a voluntary daily indoctrination to the party line.
As a result of the daily routine, they tend to adopt their ideologies and values to whatever they've heard on the radio/tv. The Republican party knows this - the Republican sweep of the mid-nineties owed much to the newly-created conservative media outlets.
Post 9/11, the Republican Party has used scare tactics to great effect and so the "socalism" tactic is just another way for their demographic to recall negative memories of the Soviet Union. I'd venture to say that the word "socialism" has a much more negative connotation to folks that had to undergo nuclear attack drills (hide under your desk!) in grade school than those that were born after the collapse of the Soviet Union.
Honest to God, if the Republican party started labeling libraries as institutions of socialized reading you'd suddenly see ordinary people protesting your local library and demonizing the librarians that work there.
So in a nutshell, many that oppose the healthcare initiatives are a willingly brainwashed mass manipulated by a party that largely employs fear as a tool and whose motivations basically distill down to greed.