LDS is an evil cult that financially exploits its members by promising things which no Christian church can promise, because Christ never said that. The Book of Mormon contradicts the Bible, but the Mormon religion is based on Orwellian doublethink.
That said Mormons probably are recruited by the CIA and other agencies with foreign agents because of international missionary work and the fact that the Mormons don’t welcome converts who have criminal records. Also Mormonism is an “all American religion” that has no connections with any foreign governments, unlike most Christian denominations, nor is it a member of an organization like the World Council of Churches (which in the 1970s was deeply infiltrated by the KGB by extorting leaders of the many Protestant, Old Catholic and Orthodox churches behind the iron curtain or influenced by churches behind the iron curtain, or in the case of Finland, through a government that was capitalist but itself subject to Soviet coercion in terms of foreign policy (see Finlandization) by threatening reprisals against their laity and clergy, such as the Lutheran Churches of Estonia, Finland, Latvia, Lithuania, Russia, Ukraine and Poland, the Evangelical Churches of Hungary and Czechoslovakia, and the Bulgarian, Czechoslovakian, Ethiopian, Finnish, Georgian, Japanese, Polish, Russian (except for the anti-communist Russian Orthodox Church Outside Russia, also known as ROCOR, which is based in New York City) and Ukrainian Orthodox, and also half of the Armenian Apostolic Church (the Catholicosate of Holy Etchmiadzin and All Armenia, but not the pro-American, anti-communist Catholicos of the Great House or Cilicia based in Lebanon).
The Serbian Orthodox as part of Yugoslavia were in a communist dictatorship that had friendly relations with the West and hostile relations with the Soviets since Tito and Stalin had a bit of a row in the late 1940s. Thus, they were not pro-Soviet.
As a result the WCC developed a tendency to endorse Soviet foreign policy especially regarding Communist regimes in Africa, Asia and Latin America, such as the Anglolans, the Derg Communists in Ethiopia, who martyred the last Emperor for refusing to renounce Orthodox Christianity, and pro-Soviet regimes like Libya.
For this reason the WCC was boycotted by several anti-communist churches, notably ROCOR, most of whose members were emigres at the time descended from Russia, Ukraine and Belarus (then the RSFSR, the Ukrainian SSR and the Byelorussian SSR), with a few from elsewhere in the USSR such as the Kazakh SSR, the Uzbek SSR, and the Moldovan SSR. Since the downfall of the USSR and the Warsaw Pact, the Georgian Orthodox Church withdrew from the WCC in 1997, and the Bulgarian Orthodox Church withdrew in 1998, and the Greek Orthodox Patriarchate of Jerusalem ceased almost all participation in WCC events.