I see your point, but if we are to go down this route: At least 6 billion disabled people (or undocumented workers) aren't being tortured, killed and eaten by humans, including most leftists, every year. Hell, half of them won't even recognize what I am talking about and the rest won't even consider it a legitimate issue.
In case it isn't obvious: not only am I using hyperbole, but also, I do not even think of such description as I use above a valid presentation of the cause I favour.
I think most leftists do support various notions that support disabled people:
1. Universal healthcare 2. Basic welfare 3. Opposition to all forms of vulgar Darwinism 4. Support for state sponsored medical research 5. Accessibility laws, technologies, etc 6. Non-discrimination on the basis of physio/psychological issues
and so on.
The problem is not that we (leftists) favour "illegal immigrants" over disabled people. The problem is that we do not do a lot about it, in either case. After all it was the immigrants themselves who marched in the 100s of thousands a few weeks ago.
--ravi