Jent and Joseph, you have both claimed that the glass houses concept, and he who is without sin should cast first stone are non-jewish. I previously provided a source from Sota about the chossid shoteh who is machmir on others and maikil on himself. Possibly another proof, as well.
If you believe one who is weak in an area should still be giving mussar to others, then that reminds me of a very funny incident.
There was a very famous president a while back who did some very infamous things with an intern. A very famous minister was called in to provide mussar and lessons and teachings on how to control the yetzer hara and strengthen the family structure of this president. At the very time this minister was providing these valuable lessons and counseling, the minister was busy with his own “friendship” and was having a child with someone other than his wife. The entire country found this out-and-out hypocracy rather humorous. I would say that Jent and Joseph are probably the only two people in the country who are on the side of this very famous minister. You should both be congratulated for mounting a very spirited defense of the minister. I am sure he would hire you on his PR team. My only request is that I should get a percentage of your fees for making this wonderful shidduch.