Holy Qur'an, the direct source from the ALLAAH (SWT), and the promise from ALLAAH (SWT) keep Holy Qur'an away from any infiltration, corruption,....etc. Islam is the oldest and latest religion in the whole world, and also, the best source for the modern world as well, seriously.
This guy need to be remind again that whoever try to change or to encourage infiltration, will have very long suffering with more than many diseases to expect. History does repeat itself, and it's our duty to guide him to the right direction, or at least, warn him/her for his sake to avoid being punished forever by ALLAAH (SWT).