If you look carefully, you might notice that my post was a direct and specific reply to an earlier post that specifically mentioned Kedem Light grape juice.
It is entirely unreasonable to infer from my post that I approve or even am not bothered by any same or similar practices from any other firms.
I am not personally familiar with the examples you describe but assuming they are accurate, I absolutely urge people to protest and boycott no less.
(Nonetheless, as a Jew, whenever a less-than-honest or honorable practice is committed by fellow Jews, it is obviously of greater concern to me personally.)
Finally, your particular choice of words in “Jew company” is offensive (it should be “a Jewish company”) and I have to wonder whether it wasn’t deliberate.