Does the phrase: "May the Jew's luck be blackened," said in a moment of anger and emotional release, constitute apostasy or affect the marriage contract?

There is nothing in what you said that would harm faith in the scriptures or the prophets, or that would insult religions, so cast away these whispers.

We alert you to the prohibition of supplicating against one's children, for the Messenger of Allah, peace and blessings be upon him, said: "Do not supplicate against yourselves, and do not supplicate against your children, and do not supplicate against your wealth. Do not choose a moment when Allah is asked for a grant and He answers you."