ANSWER: This is not kufr but it’s not permissible to use such signs that are predominantly used by the disbelievers.

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ANSWER: Such droppings of insects are pure as they are negligible. However, it seems that it also undergoes a rigorous process that would change the characteristics of it.  https://islamqa.info/en/answers/162658/ruling-on-eating-sweets-that-contain-gelatin-and-carmine

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ANSWER: Scholars had differed over the ruling on trading with the enemies of Islam. The most authentic opinion is that this is permissible. However, if this company was slandering your mother or abusing your father, would you have ever asked about the ruling in dealing with them? Here is where you test your Iman !

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