So there's really no way to tell who is just and devoted to god based on a country's military and economic strength.
That is not exactly true. I said God guarantees security nations that follow his message with devotion and he promised he would defend Israel and they would never be removed from their land again after the diaspora (this one is dependent on interpretation but seems to line up). Now what I did not say and which you are for some reason extrapolating from this is:
1. All military strength is a result of Christian blessings. I never said that.
2. All prosperity is a result of Christian blessings. I never said that.
3. All economic weakness is because of disobedience to God. I never said that.
I in fact explained that using that same verse.
Now if I look at the US or whoever when they were acting fairly consistency with Christianity and I see they have the most powerful military and economy in history. I also see that very soon after they drifted towards secularism all that began to change rapidly. I also see that Israel has won wars there exists no military explanation for. BTW you can find recorded miracles in several battle reports from Jewish commanders. I also see in general that when the Catholics betrayed the Bible and God they produced the dark ages. However the instant Christ's freedom was restored life was restored to Europe.
In other words in general things seem to line up with God's promise. However here is even a more specific one and one of the most emphatic in the Bible.
New International Version
Bring the whole tithe into the storehouse, that there may be food in my house. Test me in this," says the LORD Almighty, "and see if I will not throw open the floodgates of heaven and pour out so much blessing that there will not be room enough to store it.
Malachi 3:10
Here is one of the most remarkable statements in theology as a whole. God is saying I dare you to do as I asked and see if I will not provide what I promised. First let me state I have never known a single Christian who tested God faithfully in this and did not receive exactly what he promised in ways you would not believe. Before you get started let me head you off at the pass as I have learned I must do.
1. This does not say anything about everything always going perfectly.
2. Bad things will happen to even the faithful.
3. It does however suggest that inexplicable blessing will occur because of faithfulness.
4. This also is another unnecessary empirical burden that Christianity assumes without any necessity to do so. If a lie they could have said you will receive rewards in heaven alone. This would mean that no proof should be expected. As usual Biblical authors assumed a burden for evidence they had no need of if lying.
IOW whether Qatar is rich or on fire has nothing to do with anything. BTW did you say Qatar is the richest nation on earth. You must mean using some specific qualifiers.