Complex sentence: Mearsheimer's general position of offensive neorealism has on other issues come into conflict with Morgenthau's strong affinity and endorsement concerning the creation and support for Israel as an enduring nation in his co-authored book with Steven Walt of Harvard University titled "The Israel Lobby".
Split into simpler sentences: Mearsheimer's general position of offensive neorealism has on other issues come into conflict, for example, with Morgenthau's strong endorsement concerning the creation and support for Israel as an enduring nation. This contrast was evidenced in Mearsheimer's co-authored book with Steven Walt of Harvard University titled "The Israel Lobby".