While I agree it's unlikely that this student did enough to warrant such a reaction from the police officer (unlikely does not mean impossibility, however--that would be a failure of imagination), the part of your comment that I highlighted in bold is simply false.The Stonker said:Then I ask you.
How in the bloody hell can a person who has severe palsy do any harm?
TELL ME!
Okay! Now if you make up with the arguement that he was inciting the crowd then it's a thing called the freedom of speech.
Because what they did here was wrong and if you try to justify the means of violence against the weak, then the police is doing the complete opposite thing.
To uphold justice and protect the weak.
It would be like having a slug against a rhino. Of course the rhino is going to win, no matter what.
Freedom of speech does not mean that you have complete license to say anything you desire. It is the case in the USA, and I assume that it is not very different in the UK, that if you are in a crowded theater and scream "Fire!" where there is no fire, with the intent to cause a panic, then your free speech in that instance is not protected. Where certain types of free speech are likely to cause harm directly, they may be silenced. This is regardless of the person's physical abilities. In the same way, each individual has a right to life--but it is not unrestricted. If you assault a person with deadly intent then you may expect that they will defend themselves, and if they kill you then they are not responsible for violating your rights. Your right to life was excepted in that specific instance.
So it is entirely possible that this student was inciting people to violence, and thus had to be dealt with. Possible, but not likely, not least due to the understandably subjective nature of "incitement to violence."