Do you think revolution can ever be justified today? 

Yes, it can be justified:  (check as many as apply)

when a government is corrupt

when a government is incompetent

when a government shuts down schools and makes everyone go to work

when a government breaks its word and raises taxes

when a government doesn't listen to the people

when a government cancels elections

when a government ruins the economy and people don't have enough to eat

when a government changes the constitution without getting popular approval

when a government discriminates against a group of people and treats them as less than human

when one country invades another country and sets up a new government

No, it can never be justified.