You're quite right. Interpreting this one case as part of a giant Nazi scheme to annihilate the disabled is irrational, unintelligent and quite pathetic.
Actually, it isn't any of those things.
You need to do a little more research before jumping to that conclusion.
The parallels to how the legal and philosophical base was laid in the 1920's in Germany for euthanasia and what those like Felos and his Hemlock Society compatriots are doing now in America is almost exact...even down to their Orwellian euphemisms.
In fact, their rhetoric today is even more polished and smooth. Felos makes the promoters of the death culture of Germany in the 20's look crude by comparison.