OOC:
No, it isn't. Please elaborate.
In anarcho-capitalism, there is no state which a political party could use to harm people. The only harm results from people independently harming others... this is not, however, the result of allowing political parties, as even in a one-party state such wrongs could occur. The political manifesto itself does not cause harm to any innocent party.
On the other hand, take socialism. If you have a socialist state, the state is used by the the political party to confiscate wealth from individuals and give it to others. Some of the people who have their wealth taken are innocent people and are "harmed" by the loss of wealth, thus, socialism does harm innocent people.
You may argue that the net effect of socialism is good for society and the net effect of anarcho-captalism is bad for society. And I might even agree, at least in the latter case. But the fact remains that the ideology of anarcho-capitalism doesn't harm an innocent party.