"On the one hand I have no personal objection to the destruction of one measly office building "

Crowsister have you ever been involved in an evacuation of a public building, watched firefighters risk their lives, saw ambulance crews racing to the scene, hundreds of people told to get out of nearby properties due to fear of fire spreading ?

Clearly you haven't otherwise you would not have made that statement.
Tell us, is there a difference in students causing the destruction of an office building, or dissident republicans or Muslim extremists ?

I have never read such an irresponsible comment on any website.