I think these two stories are different.<quoted text>
Saul realized that David, not Jonathan, would succeed him as king.
Until Ruth married Boaz.
... because it isn't a fact.
Where are the chapters and verse to back up this "fact"?
I think an honest assessment of David and Jonathan can conclude in an admission of a powerful emotional relationship that had very definite sexual elements, especially on the part of Jonathan. The lineage of the Kings is an essential part of the story.
But, of Naomi and Ruth, the same sexual overtones are not evident. I believe that there was a mother-daughter love in which Naomi literally adopted Ruth and the two took care of each other. The rest is a matter of how Ruth was brought into - grafted - into the Hebrew Life. That contributed directly to the lineage of both David and Jesus.
As a direct result, the story then becomes significant in a number of ways that recognize the value of the Hebrew culture and its deeply developed, esoteric and monotheistic theology and its subsequent dissemination into the foreign genetic structure - the Spreading of the Gospel of Christ, combined with the Covenant of Abraham.
Remember, the Incarnation of Christ is just as much genetic as it is the appearance of perfection in Spirit. The Qaballic saying is, "As above, so below." If this were not so, we would not have reason to dwell on the lineage of the Mother of Christ - she was the descendant of David.
This is the Spiritual message of the Gospel of Christ.
The Hebrew/Jew will understand.