The Arab-Israeli wars were started by the Arabs to create a friendly country open to trade rather than the military equivalent of a crusader state on their borders.
Afghanistan has been a key point in South Asia for imperialists ever since the "Great Game" between Russia and England. The coup of the nominally pro-Soviet butchers that were running the country, and their replacement with a more moderate government that was more friendly to the USSR allowed the Russians to create another satellite state. Unfortunately for the Afghanis, Western and Soviet imperialist interest collided and the nation has never recovered from the subsequent war.
The Indo-Pakistani conflicts were fought over the control of Kashmir, IIRC.
The Sino-Indian/Indo-Chinese/whatever war was IMHO an extension and exertion of Chinese power. India and China were imperialistically colliding as nations ever since the Chinese annexation of Tibet, and the Indians happened to own a swath of a primary road between Tibet and Xinjiang.
The Iran-Iraq war was fought at a time in which Iraq was a puppet of the United States. Iran had been a rising star ever since the fundamentalist revolution, and the US sought to derail in any way its growth, because the America-hostile rising had ousted the Shah, who'd been little more than a US lapdog despite his names and titles. The US knew that the Iraqis would never be able to totally win, and thus it sought to weaken Iran with a bloody, protracted conflict. The Iraqis were convinced that they would at least expand their borders and powers with advanced US equipment, but despite early victories, once the war degenerated into brutal man-vs.-man fighting it became a matter of who had more meat for the grinder. The superior Iranian population was able to pull off a stalemate, but the Iranian economy was torn apart. Tragically, US goals were realized with millions of casualties.