As far as I know not all the governments doesn't want bitcoin. I think there are really few number whereas they somehow agreeing to this and participating to the cryptocurrency world. Anyways, in my opinion, some of the government doesn't approve of bitcoin maybe because they are afraid to what it can bring to the society and to the fiat currency each country have. Another one is that they cannot really control its value, demand, usage, and so on and sometimes it is used in illegal doings.