Far [insert preferred political allegiance] simply means extremist, usually unwilling to compromise. Whether you think that's a good thing or a bad thing depends on your personal political opinions, but generally speaking an inability to reach a compromise is not a desirable trait regardless of your political leanings.

As a saying goes, perfect is the enemy of good. We don't want people refusing to embrace more libertarian policies simply because they don't get everything that they want. Progress is achieved by steadily grinding away at the norm, not by having a big explosive change all at once. That's what communists want.