This seems like something you are passionate about. It seems more personal to you than to others. That's neither an insult or a criticism. Just my observation.
When you can answer the question "WHY did Abram give a tenth to Melchizedek?" you will have more wisdom about the heart of giving and how it is related to our heritage as people of promise.
What's worthy in a discussion like this is to look at the actual events surrounding his meeting with Melchizedek.
* Abraham intentionally returned to the source from whom the loot was stolen, which indicates his not considering it to be his property.
* Abraham's vast wealth was still located in northern Canaan when he went on a mission of war to retrieve his nephew from the marauding kings, therefore his not giving Melchizedek anything from his own personal wealth.
* He handed over a tenth of what was in his keeping prior to his returning the remainder to the victims of the theft...apart from the portion for his soldiers who went with him into battle.
* He was offered the option of keeping it all, which he refused, which also speaks to the reason he was returning it all to the rightful owners in the first place, all of which points at the fact that he never considered it to be his property, but property in his keeping.
What's amazing to me are those, who in the past, tried to posit the idea to me that the traditions of those days and beyond were that the victor "always" keeps all the loot as their own. Well, Abraham demonstrated that he was that much more of a cut above those other men throughout much of time who were not of the same caliber as Abraham. He had no need for the wealth of others given that the Lord had already blessed him with wealth far in excess of those cities and any other kingdom around that area.
So, yes, you're right. I do take exception to the fabricated falsehoods that others use, including the pseudo spiritual and emotional distractions applied in order to keep the focus off the actual events and the items involved, including living people who were a part of that "loot."
Giving honor is our answer as Israeli's as to why Abraham, our father, handed over a portion to Melchizedek. The text declares that and assuming anything beyond, as some in the past have done in conversations, has made me wonder as to their sourcing. As you can imagine, I've heard some pretty strange things from some.
MM