Yes, Keith's statement, "Everyone knows that Israelis do not care about hurting Arab civillians." obviously fell int a sarchasm.


Sarchasm:

1) The span of time between the point when an ironic/sarcastic statement is uttered and the point when the listener/reader realizes what was actually meant.

2) The difference in degree of wit between a person who makes an ironic/sarcastic comment and a listener/reader who is incapable of recognizing irony/sarchasm.