My claim of what ? Of Webkit being based on KHTML ? Yes, I can back it up, it's a very well known fact. Here's the Mailing list post on KDE's mailing lists for Apple's release of WebKit that talks of the changes they made in KHTML/KJS :
http://lists.kde.org/?l=kfm-devel&m=104196912316326&w=2
KHTML is a LGPL licensed library. The LGPL forces you to release the source code modifications you make to the library itself, but softens up the requirements for software linked against your library (a full-on GPL'ed library being linked to your project forces your project to also be licensed under the GPL).
Webkit being a direct modification of the KHTML codebase, Apple had no choice but to abide by the LGPL.
But what claims can't I back up here ? What hate ? Facts. Cold, unemotional facts. No love, no hate. Notice I haven't dug up the history of bad relations that occurred after this between the KDE project and Apple based on their failure to cooperate... another topic not related to open sourcing products or open standards, and thus off topic for this thread.
Ad hominems. Insults. Why can't you people just argue the arguments, not the posters ?