Don is correct. Neither side is pure. There is anger on both sides, depending on who's in power and who's Ox is being gored. During the 8 years of George W. Bush, the lib's were going crazy, not just in the public realm of Hollywood - Bill Maher, Dixie Chicks, Linda Ronstat, MSNBC, etc, etc. Even among the regular people in the nation there was plenty of anger being expressed towards the Bush White House. I have liberal friends who were simply angry for most of the past 8 years (still feel that Bush stole the 2001 election), etc, but seem more happy now, as their guy is in the White House and they have control of the Congress. They are a bit frustrated that the Dems in Congress haven't done more, quickly, to advance the liberal agenda, etc.
Now the conservatives are unhappy, because Obama is in charge. The conservative talk radio hosts, Fox Cable News, Hollywood folks like Jon Voight (sp) "Midnight Cowboy" fame, etc, as well as regular people out there who are joining tea parties, in anxious anticipation of retaking the Congress for the GOP.
This isn't going to go away any time soon as the country is roughly 50/50 split, one half liberal (granted some are more liberal than others), the other half conservative(granted some are more conservative than others). Unfortunately, we can't easily divide up the nation into two parts, Red America and Blue America, where conservative values, etc would rule the red sections and liberal values would rule the blue sections.
How angry is too angry? When death threats are made to the President or people in Congress, no matter which party they belong, then that's too much anger (Kill Bush movies and signs and the death threats, etc aimed at Dems in Congress now because of Healthcare being passed). However, Washington has itself to blame. Both parties will knowingly lie to the public, say anything to win the election. Win at any cost, etc.. The media interestingly can't ever get the correct figures for the cost or ramifications of a bill UNTIL after its passed. Then the next day the media will say, the healthcare bill signed yesterday by President Obama will cost the taxpayers far more than was anticipated. They did the same sort of thing during the Bush years too. Then the beltway types wonder why people on both sides of the isle are fed up and angry. Radio talk shows and Cable TV talk shows don't help the situation. Both lib talk and GOP talk shows make it their business to inflame people to get them riled up. They both are good at doing that, which of course translates into great ratings. As long as people will tune in to these radio /TV "bash the other side" shows in large enough numbers where the networks make money and the advertisers are happy, then it will continue on. When the public tires of it and tunes elsewhere is when it will stop. because then also will the ad dollars dry up.
Unfortunately, many people are easily pulled into this by listening or watching these talk shows. These radio and TV shows have and do contribute to much of the distrust Americans have in government. Every thing government does is picked apart daily by one side or the other. Even when one side likes what the government did, the other side won't. There is no winning. Unfortunately positive news doesn't sell, so both radio and TV as well as print media tend to stress the negative. Its all part and parcel of the problem of why everyone is angry.