Health, the upset of seeing a Jew break or misunderstand the laws of kashrut or tzniut are nothing compared to the pain of seeing Jews burning up with hatred and bitterness against each other, sorry if this is not seen as appropriate, but it is a deep rooted instinct within me, and I suspect many other Jews feel the same.
If you see something inappropriate and cannot mediate gently or effectively, look away, if food is not kosher, do not eat, but to turn on to another person and cause them pain and fear is not acceptable to me. It is not mere embarrassment, it is a sense of foreboding and acute pain.
I remember an Israel where you could step onto a crowded bus, see a young charedi mother laden down with bags and kids, and watch those around, secular, frum, the whole lot move themselves to help, take the kids, smile, joke and give a seat. In other countries it is rare to allow a stranger to help your kid onto the bus, in Israel the sense of being one people meant that feeling of unity. Irrespective of differences.
I am a political cynic in my old age, and do not view Israel through rose-tinted glasses, but I cannot change my instinctive response to jewish disharmony.