I don't know how people define the term 'Shahbagi'. Is this someone who lives around Shahbag? Someone who goes to Shahbag? Or someone who raised voice to demand 'justice' for war criminals of Liberation War of Bangladesh?
Well, it may seem unreasonable to demand 'justice' for war criminals (most of them are jamaat leaders) when the country has lots of other problems, like terror and violence. But it's jamaat who always let loose terror. It's jamaat who always goes berserk. Jamaat has always been against the independence of Bangladesh. Jamaat leader Golam Azam said that jamaat's headquarter is in Lahore. After Quader Mollah was hunged for his crimes during 1971 war, Pakistani Jamaat urges Pak army to attack Bangladesh. We have to ban jamaat from our country for the sake of our independence.
I am Bangladeshi, and I don't have a fancy North-American/European passport. I spent most of my life in Bangladesh, and would like to spend the rest there. It's my duty, as a Bangladeshi, to protect the liberty of my nation. I want to live in Bangladesh, not in a jamaat lead 'Banglastan'.
During Shahbag movement, jamaat tried to spread propaganda against the movement to distract people's attention from trail of war criminals. Jamaat spent MILLIONS OF DOLLARS (not Taka, DOLLARS) to hire international lobbyist, who spread jamaat propaganda in international community. Note that, Nazis during WW2 used to spread propaganda to distract people's attention.
The origin of the term 'Shahbagi' is perhaps jamaat's propaganda against war-crimes' trial. Those who demand justice for war criminals are tagged 'Shahbagi'. If so, I am proud to be a Shahbagi.
It's true that in later days, other political parties tried to use the movement for their political purpose. But that's another story. People, who started the movement, who seek war crimes justice, are apolitical. I have seen both BNP and Awami-league supporters protesting together, demanding war crimes justice.
I found this editorial piece very interesting (MUST READ) "Can a nation in which war criminals can hold their heads up high, arrogant and unbowed, ever move forward and face the future with confidence and assurance?"
During Rana Plaza Tragedy, 'Shahbagis' put their heart and soul into rescuing victims. Supporters of from all around the raised fund to help the victims. There was brave rescuer who died during rescue operation, he was 'Shahbagi'. 'Shahbagis' raised concern against 'Rampal Coal Power Plant' project of current BAL government. It's not true that 'Shahbagis' are not aware of real world problems. It's rather the opposite. They know better what are the real problems, and they are always concerned. They don't believe in propaganda. The don't spread propaganda.
I feel proud when people put the 'Shahbagi' tag on me, because I know we are the majority.
If you really like to know about the Shahbag Movement, I request you to read the Wikipedia page. Lots of other resources are available here : (i) http://shahbag.info/ (ii) http://en.sachalayatan.com/taxonomy/term/16144