Jews were loyal to God, but always picked on. They remained loyal as they were tortured to death by Nazis. God wasn't righteous to allow that.
Sorry, I don't believe Jews have been loyal to God, for example because this happened:
"'But if you will not listen to me, and will not do all these commandments; and if you shall reject my statutes, and if your soul abhors my ordinances, so that you will not do all my commandments, but break my covenant; I also will do this to you: I will appoint terror over you, even consumption and fever, that shall consume the eyes, and make the soul to pine away; and you will sow your seed in vain, for your enemies will eat it.
Leviticus 26:14-16
I will scatter you among the nations, and I will draw out the sword after you: and your land will be a desolation, and your cities shall be a waste.
Leviticus 26:33
But not all of them have been unfaithful, because:
Yet for all that, when they are in the land of their enemies, I will not reject them, neither will I abhor them, to destroy them utterly, and to break my covenant with them; for I am Yahweh their God; but I will for their sake remember the covenant of their ancestors, whom I brought forth out of the land of Egypt in the sight of the nations, that I might be their God. I am Yahweh.'"
Leviticus 26:44-45
I believe, if righteous person suffers and dies, all of that will be compensated to him by God in eternal life, which is why I don't think it is a problem, if God allows even a righteous person to suffer in this first death.
These will go away into eternal punishment, but the righteous into eternal life.
Mat. 25:46
For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord.
Romans 6:23