Pointing out errors in translation is commendable. Taking verses, and building a doctrine that is misleading, is not commendable.
Saying that the words, ‘righteousness’ and ‘justice’, do not mean the same thing in the context that they are being used, seems a little bit nit picky; because, the phrase ‘justified by faith’ is found only a few verses earlier (Rom. 3:28).
My complaint is the quoting of Rom. 4:3, with disregard to the circumstances of that reference (Gen. 15:6).
You folks that believe that faith is without flinching a muscle, ignore that by the time Abram was given that testimony, he had (under orders) traveled over 400 miles to the promised land (the hard way), and built two altars. He received blessing from Melchizedek when?....after a 300 mile round trip which included a hasty pursuit, a night battle, and a return home. Then, after he is promised for the third time (four, if you count “make of thee a great nation”, in Gen. 12:2), comes the testimony from God found in Gen. 15:6.
I don't know of whom you imagine believes that faith is "without flinching a muscle" as that is not at all the kind of faith that I hold. My faith, like that of Abraham, is a living and active faith that is demonstrated by walking BY faith and is demonstrated by my life. By the same token, those who assert faith must be accompanied by acts of good works to be salvific - making those human works part of faith that merits or deserves salvation - actually have fallen from grace and are severed from Christ. As Martin Luther stated, we are saved by grace through faith alone but it is not a faith that is alone.