So how is an anti-Protestant polemic anti-Catholic?
The admonishment by James is very clear. It is our deeds that demonstrate our faith, they go hand in hand.
That conclusion sounds familiar, unlike the RC strawman anti-Protestant polemics often rely on.
a living, creative, active and powerful thing, this faith. Faith cannot help doing good works constantly. It doesnt stop to ask if good works ought to be done, but before anyone asks, it already has done them and continues to do them without ceasing. Anyone who does not do good works in this manner is an unbeliever...Thus, it is just as impossible to separate faith and works as it is to separate heat and light from fire! [http://www.iclnet.org/pub/resources/text/wittenberg/luther/luther-faith.txt]
This is what I have often said, if faith be true, it will break forth and bear fruit. If the tree is green and good, it will not cease to blossom forth in leaves and fruit. It does this by nature. I need not first command it and say: Look here, tree, bear apples. For if the tree is there and is good, the fruit will follow unbidden. If faith is present works must follow. [Sermons of Martin Luther 2.2:340-341]
We must therefore most certainly maintain that where there is no faith there also can be no good works; and conversely, that there is no faith where there are no good works. Therefore faith and good works should be so closely joined together that the essence of the entire Christian life consists in both. [Martin Luther, as cited by Paul Althaus, The Theology of Martin Luther [Philadelphia: Fortress Press, 1963], 246, footnote 99]More .
Christ is All that Matters Placemarker