Neville,
1. Someone uses the Kushners for maasei rav he already has a twisted and incorrect definition of Orthodoxy. They, BTW, have never held themselves up to be role models.
2. What about the chillul Hashem of constant public micro-examination of a couple’s observance or lack thereof and the obvious glee with which these blemish finders (only in others, of course) condemn them without even knowing all of the facts.? How does this make the Orthodox community appear? Moreover, if you want to find blemishes whose condemnation will score points with the non-Orthodox community then condemn the welfare cheats, slumlords. corrupt business people, etc. (BTW, financial crimes are a toeva – Devarim 25,13).
3. How are they damaging the integrity of other gerim? Jared Kushner the born Jew is doing the same things. Besides, do you really think that there are no other gerim who backslide just as do born Jews (see SA YD 268:2 that we do not tell him all of the details of observance so this could very well happen and see seif 12 that if he does fall down so long as he had intention to keep everything at the time of the giur he is like any Jew who falls).