I am sure if he allegedly broke the law, I cannot think of many laws he could break that would warrant being dragged out of a wheel chair.
Yes Manta that is quite a reasonable statement.
There will always be instances when police action will be deemed as being controversial/inappropriate/excessive.
These mass demonstrations are almost impossible to police in a way that satisfies either those who take part in them or those who disagree with them.
It is part of the raison d'ętre for their organisation - not only to make a point that is difficult to ignore (due to the numbers concerned) or to provoke a police response in the hope of gaining additional publicity by discrediting the police.
Society has to make its mind up how they wish to see these things policed. Should the police simply contain the demonstrators within a cordon and allow them to act as they please until exhausted or should they actively discourage disorderly behaviour by robust means. It's no easy call.
I always found it regrettable when people were injured but I’m afraid that in a situation where violence has been or is likely to be used, people can be injured.
Insofar as trying to reason with anyone in a demonstration – especially a mass demonstration - this is all but impossible and I'm afraid that if they’re considered to be in the way, then the easiest thing to do is to remove them in the most reasonable lawful way possible in the circumstances.
Whether it was right in these circumstances to pull this young man from the chair I can't say as I wasn't present however, as always, every police officer knows that should it be proven - in this age of the camera-phone - that they have indeed acted unlawfully then they will face sanction.