Please read the clarification clearly!!
LKY stated that he did not make these remarks (about Islam being venomous) to Senator Hillary Clinton, who is now US Secretary of State.
However, he did NOT state that he didn't make these remarks at all.
The Wikileaks cable says that he made the remarks to a guy called Charles Rangel who was a US Representative (Congressman/MP), and NOT Sen. Clinton!!
Full text of the cable:
http://thesatayclub.net/2011/09/wikileaks-lee-kuan-yew-labelled-islam-a-venomous-religion/