The prosecution wants to make sure the process by which the evidence was obtained is not truthfully presented, because, as often as not, that process will raise questions.
I have been defending Israel's right to exist, and to defend itself against terrorism, for many years-on college campuses, in television appearances and in debate.
It simply cannot be disputed that for decades the Palestinian leadership was more interested in there not being a Jewish state than in there being a Palestinian state.
The defendant wants to hide the truth because he's generally guilty. The defense attorney's job is to make sure the jury does not arrive at that truth.