Because those countries are trying to disable a currency that has the potential to drive the wealth produced in the country to overseas. Besides this, governments want to have capital control over people's money
For Russia this is true, but I think a lot of companies just don't understand the concept of bitcoin and thus hearing it as a criminal currency making them afraid and just ban it.
image of bitcoin is bad,
how to keep the image of bitcoin could be improved?
by not using it
These days, Bitcoin is called a "way for funding terrorist". You will see many banks who will close all the acc. realated with Bitcoin.