Answer #1: It's less like "denial" and more like "clarification", as in spelling out some of the lesser-known details surrounding The Event from which Israel was created. I could have written a lot more, but I kept it to the bare minimum that I felt was required to answer his point about being callous.

Answer #2: Sure. Why not? It's not like we live in some Orwellian world where, in some places, you could go to prison for merely disputing the so-called "facts" surrounding a particular historical event. Oh no, wait ... http://rense.com/general68/susni.htm (The UN Decides On A Universal Ban On Revisionism)