Q. 1 Only Franz Josef of the mentioned people was a Hapsburg, and he was, in fact, the emperor.
the second question it true: He needed to put down rebel uprising, as else they would dethrone him, but he also gave his subjects a constitution, even if this was not in power for long and did not grant many rights either.
The last question's anwers is Nationalism- a strong attachment to the nation, or country.