Unless the speech is relating to something that happens in Silentium (the third forerunner book). It sounds like he is claiming innocence for trying to snuff humanity and ensure Forerunner dominance (a feat he did not try to accomplish until Halo 4).
It sounds like he is talking to the Forerunner high council (or possibly the Librarian, seeing as 343 GS thinks she is alive by the end of Primordium).
Inflammable means Flammable? What a country - Dr Nick Riviera