I have not seen a single reason why people shouldn't be anti-government or why it is even wrong. I keep seeing it being thrown around as an insult but how is that an insult? Its strange that people who claim to be 'liberal' want to embrace the one thing that removes your freedom and is responsible for an unliberal state of human existence.
Liberalism and government have always been at odds. That is another post...
Big government comes with modern times and growth of population. We are no longer an island separated by a time frame where we can exist in a vacuum, if we ever were. We are no longer an agrarian society struggling against industrialization. The industrial revolution came and went and conservatives and their spawn just want to stick their heads in the sand and pretend we can live back in 'the good old days' of child labor, slavery, high mortality rates on labor jobs, business with little to no regulation.
The reasons we have a big government now vs what we had at any given time in our history, has rationale and reasoning behind it. One may disagree with the rationale and reasoning, and one may argue against why certain government reaches continue on, but there is no denying things were not too good back in 'the good old days' without arguing the rationale and reasoning for the changes in government.
everything must be argued in a context that includes the how, why, when and where of how we got to where we are today.
Ronald Reagan stated "Government is not the solution to our problem. Government is the problem" and I've always stated he was wrong. When Reagan needed to get anything done he did it with the power of government. The government grew under Reagan as it does with most ambitious administrations or Congresses.
I do believe bad government is the problem. I do not believe in throwing the baby out with the bathwater. I do believe in going with emotions over reason when it comes to social policies. I do not believe a society that is anti government can last very long, for it is government itself which people have set up in order for societies to flourish.
that's only part of the short answer