No.
Not if you don`t agree with it.
I don't like this reason. If you're a Pacifist and disagree with military spending is that reason enough when that's one of the few things authorized under the Constitution?
Cheating on your taxes is one for the few things that I not only think is OK but encourage that you do if you can get away with it. It's your money and the government is stealing from you and you have no legal recourse. The amount of money taken from one person, under threat of jail or even death, and given to another person that the government, unilaterally, has determined needs it or deserves it more than you, the one who actually earned it, is not only a crime but immoral.