I have very nominally Catholic family. They are very dear to me, we would do just about anything for each other, but they are also very nominally Catholic- to the point of not baptizing their children, claiming they can wait until they’re old enough to decide for themselves. One baptized but did not follow through on the promise, and is now reaping what was sown.
Part of the reason they are so nominally Catholic is abuse they perceive they received at the hands of those who represent the Church. A little of it is real, a lot of it is perception. For one person, it took place over 50 years ago, and that person is still leery of confessionals and confession, can’t understand why I go, why I take my granddaughter (No, it was not sexual abuse, just impatience on the part of a priest long dead). For another, a teaching sister was not as kind as she hoped, and favored another student (who was one of those kids the sisters “always” favored), can’t understand why we insist on the girls going to Catholic school or being homeschooled. We all have a common relative who thinks she is the pope, and makes ecclesiastic pronouncements on one hand; then, turns around and engages in such practices as racial prejudice and bigotry (doesn’t want a certain racial group in her parish, calls them by a perjorative), extreme gossip, manipulation, back-biting, etc. Another relative, spouse to the former, has returned to the practice of the Faith after a very, very, very, very, very long hiatus, but has made no changes in his life other than going to Mass on Sunday and going to confession once a month. He is still mean, still nasty, and now out to convert people by bullying them into it (yeah, that’ll work).
In my opinion, it is fine to look for opportunities to witness, in the sense of, “Please come along to this or that”. Family sacraments are a very good time to invite people, as are good old fish fries, spaghetti dinners, pancake breakfasts, May Crownings, Corpus Christi processions, school activities, etc. It is good for them to see the Church in a good light, to remember the things that were and are still good about it.
I would agree that the CDs will probably go unlistened. A few years ago, a family member expressed a desire for a Bible study as a Christmas gift. I got A Father Who Keeps His Promises by Scott Hahn. Well, that is not what was wanted, as it involved having to verify what Dr. Hahn said and use the Bible. They wanted it spoon fed, and at the time, I didn’t know about Jeff Cavins. So, the book sat, and is probably still sitting there.
So, I would have to say, in my opinion, the best thing to do is set a good example while keeping one’s humility, and to attempt through casual conversation to seek the root of the problem as to why these people no longer practice. You can’t solve it, whatever it might be. You can’t bully them into it. But, finding out seems to give the opportunity to say, “I’m sorry that happened to you. Here’s my take on that” in humility and meekness, without rancor and criticism (not to be confused with judgment).