It's interesting you should mention "since 1948." When you read the following moral polution that was interjected into the Arab world (just as it was interjected into Russia, China, Central and South America, South Africa, etc.), suddenly Middle East terrorism post 1948 comes as no surprise:
Excerpt from "We Are The Next Target," 1994
When Karl Marx wrote his book, A World Without Jews, he permanently set the tone for Communist anti-Semitism. He called for "the emancipation of mankind from Judaism" and for the end of all religious faith.[59] V. I. Lenin applied this principle against the Jewish longing for Israel in 1903, declaring that "this Zionist idea is absolutely false and essentially reactionary."[60]
The Communist drive to abolish Judaism took on a special urgency after World War I, when Jewish settlement in Palestine began interfering with Communist plans for a socialist, pan-Arab government. Over the next few decades, the Communists instigated Arab riots against Jews and organized anti-Zionist movements.[61] These tactics failed, and the nation of Israel was reborn in 1948.
But in 1964 the Soviet KGB made a decision to escalate wars of national liberation around the world. Its spending on terrorism grew ten-fold, and training centers were set up throughout the Communist Bloc. In less than two years, Cuba hosted the Tricontinental Conference--a meeting of 513 representatives from 83 terrorist groups. The Cuban Communist regime thus became a coordinating center for this growing international terrorist network.[62]
Israel was vaulted to the top of the list of target countries. The pro-Soviet dictator of Egypt, Gamel Abdel Nasser, launched a new revolutionary group in 1964--the Palestine Liberation Organization (PLO).[63] Declaring the palestinian Arabs an "oppressed class" who needed to be "liberated" from Israeli rule, the PLO announced that it would destroy the nation of Israel altogether and replace it with a socialist government of Palestine.
Great snippet. Each footnote checks out. We've been had.