I absolutely support this, not sure why supporting cuts in the National Endowment for the Arts while we run huge deficits makes me a coward though.
I'm not saying this necessarily applies to you, but generally those who support cutting the arts do so either because they fail to see the value of the arts in society, or because they see artistic expression as a possible form of dissent or political commentary that needs to be stopped. Those in the latter group are the ones I would describe as "cowards." Also, Scott put it very well. We're talking about a cut that would hardly benefit anyone, while hurting many people.
I would also add that politicians who advocate cutting funding for the arts "because deficits" should be branded as dishonest since all they're doing is attacking an easy punching bag so they can tell their innumerate supporters that they've done something to "cut wasteful spending" without in fact tackling the actual causes of ballooning deficits or making even a minuscule dent in the deficit.