RebEmes, maybe you do not have enough imagination how other people live. Someone who is raised in non-religious community may have “heard” something, but does not mean they fully understand the concepts. They may even have heard put it in such context that they do not take it seriously.
Most of those Israelis were not from religious families – Israel on average is becoming more religious, not less, B’H in the last 80 years. So, most of the (still) non-religious might have had kibutznikim grandparents… And even when you are talking about OTDs that grew up in a religious community, it might well be possible that their family and community did not present Yiddishkeit to them in the right way. I am not saying that real reshoyim do not exist, but in this generation most simple people have good excuses for their behavior, ignorance being the primary one.