Hi Marcel, good outline.
Modern JWs aren't even aware of it, but I believe it was around JF Rutherford's time, when the WT jumped over to what is commonly referred to, in regular Christian circles, as "Replacement Theology." In other words, and to put it simply:
Wherever ISRAEL is mentioned in scripture (2,605 times), they decided to "REPLACE" it with THE CHURCH (in this case, THE WATCHTOWER and/or its "Faithful & Discreet Slave Class" to be more specific). And wherever JERUSALEM is mentioned in scripture (813 times), they decided to "REPLACE" it with HEAVEN.
Like Carla said, they 'spiritualized' verses to suit their theology.
The JWs would be surprised, I believe, if they realized they shared this Israel/Church, Jerusalem/Heaven misinterpretation with other MAINSTREAM "Christendom" denominations (to JWs, "Christendom" is a horror-word). Notice the JWs are #24 on this below list...
http://www.watch.org/showart.php3?idx=64261&rtn=/index.html&showsubj=1&mcat=1
[...]
Below is a list of the 25 largest churches in America. The churches that [have the >> marks] are confirmed replacement theology churches. We are still attempting to confirm a few of the smaller church positions.
The Church
U.S. Membership Denominational Ranking: Largest 25 Denominations/Communions --2004 Yearbook of American and Canadian Churches
>>1. The Roman Catholic Church - 66,407,105
2. Southern Baptist Convention - 16, 427, 736
>>3. The United Methodist Church - 8,251,042
4. The Church of God in Christ - 5,499,875
>>5. The Church of Jesus Christ of Latter-day Saints - 5,410,544
>>6. Evangelical Lutheran Church in America - 5,038,006
7. National Baptist Convention, U.S.A., Inc. - 5,000,000
8. National Baptist Convention of America, Inc. - 3,500,000
>>9. Presbyterian Church (U.S.A.) - 3,407,329
10. Assemblies of God - 2,687,366
>>11. The Lutheran Church - Missouri Synod - 2,512,714
>>12. African Methodist Episcopal Church - 2,500,000
13. National Missionary Baptist Convention of America - 2,500,000
14. Progressive National Baptist Convention Inc. - 2,500,000
>>15. The Episcopal Church - 2,333,628
>>16. Churches of Christ, Corsicana, Texas - 1,500,000
>>17. Greek Orthodox Archdiocese of America - 1,500,000
18. Pentecostal Assemblies of the World, Inc. - 1,500,000
19. American Baptist Churches in the U.S.A. - 1,484,291
>>20. African Methodist Episcopal Zion Church - 1,430,795
>>21. United Church of Christ - 1,330,985
22. Baptist Bible Fellowship International - 1,200,000
>>23. Christian Churches and Churches of Christ, Joplin, Mo. - 1,071,616
>>24. Jehovah's Witnesses - 1,022,397
25. Church of God, Cleveland, Tenn., - 944,857
[...] End quote.
For more info re: "replacement theology":
http://www.therefinersfire.org/replacement_theology.htm
http://www.middletownbiblechurch.org/reformed/israelaf.htm
http://www.shomairyisrael.com/Articles/replacemenetheologypartone.htm
/ag