Before I became a Christian, I grew up as a religious Jew and was Ordained as an Orthodox Rabbi. So I feel a deep need to reply to this. It is true that + signs are not in common use in Israel as they resemble a cross. Even today on El Al planes the Volume and Channel controls are a "-" and an inverted "T". For that matter even many Synagogues, especially the more ancient ones, are careful in laying out there floor tile so as not to inadvertantly create the sign of a Cross. This has nothing to do with hatred of Christians, in fact many Orthodox(aka religious) Jews, especially those from Traditionally Greek or Middle Eastern families will tell you that Jews got along fine with Christians in Israel until the Catholics came in the Crusades.
Please understand that for a Jew, especially one from Western Europe, the Cross is a very offensive symbol. It has been the symbol of persecution and death. Historical fact states that the Roman Papacy ruled that it was just as noble to kill the Jew in you own country as it was to kill the Muslim in the Holy Land. The Nazi's used the cross and around it the word's "You killed our God now we kill You." Also the Russians were none too kind to the Jews, but as far as Orthodoxy they were the only ones that did not treat the Jews will Christian Charity.
Go to the walk of the "Righteous of the Nations" in Israel and count the number of Orthodox Bishops and Metropolitans that worked so hard during WWII to save Jews, most especially in Bulgaria where the Church there managed to save all of their Jews from the Nazi death camps. On account of people like this, and on account of the fact that the Great Rabbis of the past forbade it, Jews do not disrespect Christian Churches or Holy Symbols. The only thing that could be considered as such would be in the western european communities Jews were not supposed to walk on the same side of the street as a Priest or a Church, but this was for fear of abduction(a common practice in the Catholic West).
However in the Eastern European and Middle Eastern communities there were no such customs. The charity of the Christian witness has been well known there. In fact one excellent example and the reason that I myself became a Christian was because of the Holy and Honorable Metropolitans Cyril(later Patriarch of the Bulgarian Church) and Stefen of Sofia in Bulgaria who helped to save the Jews, and thus lead the Chief Rabbi of Bulgaria Daniel Zion to a knowledge of Christ. Daniel Zion later moved to Israel, where he was a part of the Chief Rabbinate of Israel and one of the Religious Judges(this is how I met him in my younger years at which point he gave copies of his writings which I have pondered over ever since). He never formally converted to Christianity he remained a religious Jew, yet he believed most fervently in Jesus and even taught the New Testament in his Synagogue to the day of his death. I state this to show what, when hatred is put away and loving understanding given, the Christian witness can do.
