let me answer your question regarding who started it. This is fifficault to answer becuase the initial incident that started this can be seen either way depending on your viewpoint. Jews were mnoving to palistine since before the WWII to escape persicution, at this time palistine (which is now isreil) was an arab state with a majority arab nation. As the jewish population of palistine increaced there was much tention between the palistinian people who felt their land was being taken away and the jews who thought that had a right to be there as it is written as the "promised land" in their holy text. As tention grew a solution came in splitting palistine into two seperate countries, one half given to palistine and the other to the jews and thus isreail was born. When this happend an attack by the arab population was made adainst the newly formed nation iof israil hoever due to their superior firepower the jews won this battle and also won the half of modern israil that bolonged to palistine. Years later israil invaided parts of egypt, jordan (the west bank) and Syria (Golan heights), this attack was not provoked but these territories were occupied anyway which is against international law. Eventually the part of egypt that was occupied was returned (except for the gaza strip) but today the west bank and the golan heights still remian occupied by isreil. In the past there have been many attempts to resolve this issue with peacful talks. The closest to solving the issue was in 1993 hosted by bill clinton in which the israili leader and the leader of the PLO (palistinian liberation organisation (nb: this is not the terrorist group)) in which (this figure may be wrong) 83% of the west bank, the largest proportion so far, was offerd to the palistinians for peace but this was turned gdown as none of jereuslam was offerd. From there it has all gone down hill, with the faliure to gain peace the hard line leader arial sharon was elected to power and the situation has been getting worse since. Its also worth mentioning that the palistinians have tried peasful resistance. This was knon as the "intifada" (sp) in which palistinans refused to obey cerfeus and restrictions placed upon them however this was met by violance. The terrorist group Hamas (responcible for most terrorist attacks in israil today) has put up alot of resistance and made countless attacks on isreil. The israli govrnment does over react to these, one teorist attck had lead to attach helicopters, troops and tanks deverstating refugee camps killing inncoent people and destroying the little these people have. Homes have been destroyed because the occupent is "suspected" of coordinating attacks. This retailaiton had increaced tention over the years and i believe causes more young people who are surrounded by this violence to join hamas. I hope that helps you see who started this, as has been said before the UN has a resolution agains israil demanding immidiate withdrawl from the west bank and gaza strip buy years later it has still been ignored. Now i will say why this wall is bad. As israil occupied the west bank and gaza with jewish settlements in these areas, the supply to food and water has been taken away from palistinian people as has the oppertunity to work to survive. Many palistinians need to enter israil to buy much needed commodities and food as well as work so they can buy these things. The wall will make it impossible to do so making the peoblem worse still.