Curtis wasn't diagnosed with epilepsy until late 78; he had been 'dancing' in that manner some time before that. It was questioned (still is) at the time whether he knew prior to this diagnosis and almost took the 'p' out of himself with his dancing, or whether this was co-incidence and he just danced that way because he had witnessed a friend having fits.
LWTUA was said to be his suicide note, but if any song could be argued as being, I would have thought In A Lonely Place fitted the bill with a death wish reference.
It is clear that he had become increasingly depressed and had already taken an overdose. Also, the very heavy dose of barbiturates he was prescribed had clouded his views.
The so-called Nazi connection was brought on by the band themselves and they made no effort to deny it or otherwise. They did have a fascination for fascism, but the more the Music Press hounded on and on about it, the more the band made light. It was only some years later that they did in fact admit to having had a fascination - but we are talking 25+ years ago...........it was an era when lots of people did. I am led to believe that when they do interviews now, it is made clear in advance that they will not answer any questions relating to the subject. How true that is, I don't know.
I don't think JD could have evolved into anything more. The music scene in the early 80's changed so frequently and the British vinyl buying public (the majority) were quite happy to go with the flow with the introduction of lighter 'pop' music and JD only offered dark and often depressing songs, which inevitably would have seen them disappear along with many other bands who were unable to 'keep up'. 