In response to your letter and question about giving to Israel today. It is good to see that the doctrine of grace is clearing up your thinking about how God views Israel today and how that relates to the verse in Genesis 12:3
“And I will bless them that bless thee, and curse him that curseth thee: and in thee shall all families of the earth be blessed.”
In prophecy, after the great tribulation is over, the Lord Jesus Christ will judge the nations (gentiles) on how they treated Israel (especially during that time) – did they help them or work against them? This is what Matthew 25:31-46 is about. Notice especially verses 34 & 41
“Then shall the King say unto them on his right hand, Come, ye blessed of my Father, inherit the kingdom prepared for you from the foundation of the world: … Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me.”
“Then shall he say also unto them on the left hand, Depart from me, ye cursed, into everlasting fire, prepared for the devil and his angels:”
Genesis 12:3 is the prophetic program which will be fulfilled in prophecy. Romans 11 is explaining what changes have occurred in the age of grace. The phrase in Romans 3:22 and 10:12 which say “For there is no difference” makes the point that both are under sin but both, by the grace of God can be saved today. Yet since there is “no difference,” Israel has no special status in God reckoning today. In fact, Israel as a Christ rejecting nation has been brought down to the status of the God rejecting Nations (Gentiles) during this age of grace. It is now individuals that God is calling and saving, not any nation.
Consider these verses concerning God’s attitude toward Israel as a nation today, and these will answer your question as to whether God is blessing those who help Israel today:
“Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fulness? For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:” Romans 11:12,13
“For if God spared not the natural branches, take heed lest he also spare not thee. Behold therefore the goodness and severity of God: on them which fell, severity; but toward thee, goodness, if thou continue in his goodness: otherwise thou also shalt be cut off.” Romans 11:21,22
“As concerning the gospel, they are enemies for your sakes: but as touching the election, they are beloved for the fathers’ sakes.” Romans 11:28
“For God hath concluded them all in unbelief, that he might have mercy upon all.” Romans 11:32
These verses say that during this age of grace, Israel as a nation has fallen, is cut off, not spared, under severity and even enemies of God for the gospel sake. Supporting that nation would be support a nation that God thinks of this way.
Now, understand as well, any gift to help the poor and needy in any nation is a good thing. God did say “remember the poor.” So giving to a worthy cause is always good and right, but there is not special blessing of God today if those being helped are Jews.