Support or oppose something when it suits your needs?

Recently, PM Sheikh Hasina, her son and other ruling party people accused The Daily Star editor for supporting and working for the last caretaker government led by Fakhruddin Ahmed. Our humble question to this government and the PM is, if the last CTG is unconstitutional, then why didn't AL agree to take part in the election under the Iajuddin Ahmed-led caretaker government? Their violent protest had made the path for Fakhruddin-Moin U Ahmed to ascend to power and keep hold of it unconstitutionally for nearly two-years.

The present government has also branded the caretaker government unconstitutional. However, in the 1996 election, AL had come to power through an election conducted under a caretaker government. If CTG is now considered so unfair, why didn't they practice what they preach now in the past? Is it fair to support or oppose something only when it suits your needs?