Just because it is anonymous doesn't mean that it has to be used to fund terrorism. You can do that with pretty much any currency already, so instead of focusing on the potentially evil ways of using bitcoin, I'd rather concentrate on its positive sides.
But that feature is being abused and we can't deny the fact that terrorist can really use bitcoin for their fund. A politician or someone we don't know that has wealth who wants to support their terror group can use bitcoin.
Here in my country the government is warning us that whomever will get caught of misusing bitcoin like that way will be punished accordingly.
Nowadays bitcoin can be used for almost everything, transactions, buying anything.