If you take faith because God kept you alive during the war as a foundation, a few conclusions can be drawn.
1) God did not want you to die in the war. Why else would surviving be proof of God?
2) God either wanted other people to die in the war, or having no preference either way for them at that point, let them die in the war.
3) God therefore has a preference for you over those that died, even if it's only to fulfill a future purpose.
I personally prefer not to make assumptions about what someone was thinking (but what they could have been thinking is another matter), but doing so at this level seems more a matter of poor assumptions and rigor to me than hate. In any case, a simple explanation of what is wrong with their reasoning along with the accusation of hate is warranted.
Keep in mind, the poster may truthfully be offended by these types of remarks, just as you ostensibly are by their response.
If you castigate them for their actions without even attempting to understand their reasoning, that makes you guilty of exactly the same thing you accuse them of in this instance.