Clinton's enemies hate him because he represents political interests that is contrary to theirs. It is just that simple. Republicans want you to hate Clinton because hate is a manipulator it makes you less critical of their people. Democrats want you to hate Bush for the same reason. It is when you understand this you will find yourself getting less emotionalized about these people.
No, they spent all that time because they had respect for the rule of law. The fact is, Bill Clinton was impeached for lying under oath in an attempt to have a sexual harassment suit dismissed and urging others to lie under oath to have a sexual harassment suit dismissed.
Prior to the impeachment votes, one of Clinton's senate allies, Robert Byrd of West Virginia, admitted on Meet the Press that he thought Clinton was guilty of these crimes -- but in a cynical political calculation, he wouldn't vote to convict. And Byrd was not alone, a former Clinton law student -- hardly a Clinton "enemy" -- held the president in contempt of court for lying under oath. And, it should be noted for history, that Clinton eventually settled with both Paula Jones and independent counsel Robert Ray rather than face prosecution (civil or criminal) for his crimes.
These are not the figments of Clinton haters' imaginations. These are facts. And it is part of the legacy that Clinton will never be able to outrun.