What is "West"? Or more precisely, who is "West"?

Al Qaida claims it targeted US because they had troops in Saudi.
Hamas targets Israel because Israel occupies Palestine. Is Israel part of "west"?
Madrid and London bombings were because Spain and UK had troops in Iraq.

You said that you will concentrate on Western targets. But attacks in islamic countries happen because their gov'ts are pro-US. Sharm el-Sheik bombings and GIA attacks were as much about killing foreigners (specially if they were Israelis) as they were about hurting Egypt by disrupting tourism and as such punishing its gov't for being pro-US. You can't separate the two, radical islamists rant against secular, pro-US gov'ts as much as they do against US/West.