Amber, good points. I guess there are two ways of approaching it, extending specific hate crime legislation and also sentencing guidelines.
Trill, I think point is, yes, setting fire to anyone should be a crime. Is a crime. However, in case of a person with a disability, autism included, their vulnerability (for want of a better word) makes the crime more abhorrent.
In the recent Sheard case, he was not only targetted but the attack was carried out by people who had befriended him (loosely speaking). What the judge described as "horseplay" may have been "true" in some scenarios, friends larking around and going too far, making a big mistake, tragic consequences etc, which could justify a lower sentence.
In the current case, however, these people had picked on the victim, taken advantage of his vulnerability. He may not have reacted the way a "regular" person would have reacted but, taking account of his condition (which the attackers presumably knew about) that is not to say (as I think the judge reflected in this case) that he appeared to be enjoying it (sorry if I am misreporting there, haven't seen the transcript, but there does appear to be an element of this in the summary).
I think what I am saying is that special conditions should apply to reflect the horrible nature of these crimes, to ensure they are recognised and taken seriously and that proper protection is given to the vulnerable. There have, for example, been specific cases of abusers targetting and befriending disabled people - which in a sense is an abuse of trust meritting a harsher sentence.