no not all government want to destroy bitcoin, we can see there are many country that start to accept bitcoin and thy want to develop bitcoin more than before, country that wouldn't accept bitcoin I think that country don't want to make any changes in the digital currency and payment system
Yes, because they are thinking that bitcoin is a threat for the country's economy much more on security reason but if they only know that there a bigger portion goodness than a negative side by using crypto currency then I think they will never against crypto currency.