Yes and no. The government of one country cannot really influence bitcoin. But let's say if the government of many countries will unite and suppose it is banned, then this will already have a negative impact on its price. I think the concept you understand.
It depends on the countries that ban bitcoin, if the citizens of those countries are not really using bitcoin then a ban like that is not going to affect its price but if the countries that announced such a measure are some of the most powerful and the most influential when it comes to bitcoin then that will crash the price almost immediately but even that movement will not be enough to make something like bitcoin disappear.
I think any country if the regulation they make is spread to the public will certainly affect the market. yeah maybe if the user in that country is big enough it will also give quite big effect. the point is we don't want it to happen to all countries because we know the role of government is very vital in the community. of course the rules will affect to bitcoin and market..