sola fide was a slogan that originated with Luther and the more I dialog with modern evangelicals (calvinists and all sorts etc.), the more I am convinced that this is where the misunderstanding is coming from.
It is funny but in my internet wanderings I would be accused of being a hyper-Calvinist (duh??! I am Lutheran and no longer Calvinist so I can not even be a hyper!) . But some accused me of being antinomian at the same time they rebuke me for having a morbid paranoia with guilt and sin. Now if you stop for a moment, surely this is enigmatic and contradictory, it should have rang some bells.
I figured since these wild suggestions stem from Protestants in line with our confession's rooted assertion that God supplies all things that he demands from us, like faith, the understanding of sola fide must be lurking there somewhere. But once again, like many early Lutheran ideas, the term sola fide has been borrowed, massaged, mangled and mis-represented differently and quite foreign to the way Luther defined it. More precisely I observe
a.) Those who rally the slogan more often than not have presented faith as a type of work.
b.) They think that sola fide means that there are no sacraments (Baptism and Supper).
I have said much on a.) lately but part b.) is where people criticise what they do not understand. They should have studied more the Lutheran confessions rather than taking the ball, running with it, playing with it without out even realizing first the rules of the game.
When Lutherans cry sola fide (as I observed) they do not mean faith without sacraments (of Baptism or The Supper), rather they see the sacraments as the means the Holy Spirit uses to produce and sustain faith, ie they are the same as the Gospel but wrapped in water and in the bread and wine as Jesus taught. Case b.) takes time to understand but it is understandable if one gives a solid ear and a search for it in Scripture is undertaken.
It is a shame that some groups have the Word but they have no Sacraments, others have the Sacraments but no Word. Both are made hungry in the end, it just takes time to realize that such poverty is there.