The capitalization of bitcoin transactions reaches billions of dollars but governments of any country can not get revenues or income from these transactions and this makes governments in many countries complain of the existence of bitcoin because it is considered a threat to the economy of a country. Should tax apply to users who do bitcoin transactions? When are users comfortable with this situation? what is the right regulation to address these issues to help each country improve its economy?
Whether furious or not furious is all their business and nobody cares. Bitcoin is open and anyone is allowed to make use of it and the government cannot stop anyone from making use of it except those that are citizens and no particular government can charge tax from bitcoin users, although they can possibly find a way to charge users that are located in their tax, but that will be a very difficult thing to do cause many people will still find a way round it.
In fact this is not something that has to do with government, they should mind their work in making their country a better and peaceful place to live and not worrying about bitcoin.