We really should not need to devolve into flamewars here. This is not Usenet. When wrestling with a pig, keep in mind that the pig likes it and you just get dirty.
Surprised it took you so long ;-) As it happens, I just had a long bath...
For the record, I personally have no real issues with Linux, nor am I personally offended or even agitated despite my learned friend's repeated assumptions that I am; one does not have to be personally offended to observe that something is rude and perhaps even offensive.
I was using UNIX and UNIX workalikes before I ever saw DOS and long before I opened my first window, so for me case sensitivity is indeed an "idiosyncrasy", "just how it works", and I don't really think about it at all.
What I was trying to get across is that if the Linux community really wants to 'sell' it to non-users, perhaps they should refrain from the tired sort of reactions we've seen in this thread. If someone says that they have trouble with some aspect of Linux, too often the knee-jerk response is a personal attack, a condescending implication that he/she is too dumb, that it's a feature and not a flaw, and of course the ever-popular "well, Windows is even worse!!!" Turning every free-standing criticism of Linux into a defensive "comparative discussion" (i.e. a counter-"attack") as my learned friend insists on doing accomplishes absolutely nothing except perhaps escalating the "battle".
If someone says that they find case sensitivity dumb and problematic, perhaps a better reply would be to respect their opinion with a "yes, it is unintuitive and can cause problems in certain circumstances (as my learned friend actually concedes), but unfortunately it's pretty well here to stay for compatibility reasons and there are actually cases where it's useful; like other aspects of Linux it takes a little getting used to and won't always make sense, but it's really not that bad once you get used to it".
Responding with denial and rejecting it with a condescending "I don't have a problem with it and even my 80-year-old father doesn't have a problem with it [so you must be pretty dumb indeed]" and personal insults like repeatedly calling the person who dared to complain a "hysterical little girl" just serves to confirm the stereotype that Linux users think they're smarter than non-users and that if you want to join the elite you'll have to learn the inner secrets before deserving any respect.
IMO, those attitudes and the de rigueur dissing of Windows and Windows users is a much greater factor in Linux' lack of acceptance than any flaws in Linux itself.