Kabbalah Ulangan 17:1: Chesed LeAvraham

And that is why all the actions of the nations, from vegetation in their fields to every creature, are not affiliated with holiness. Because they themselves are separate and distant from the blessed God, as it is said, 'When the Most High gave to the nations their inheritance,' etc. Therefore, utensils of the nations require immersion, among other matters. Their grain is exempt from tithing, like our grain is considered external. Similarly, their dough is exempt from the obligation of taking challah, like the dough of our dogs. Holiness does not extend to them at all, and the Supernal Light does not shine upon them. This is why only Israel is affected above, and they are included in 'You shall not offer anything that has a blemish' (Deuteronomy 17:1), whereas the nations of the world have no part in holiness, neither them nor their acquisitions. This matter will be rectified in the secret of 'For then I will turn to the peoples.' This means that His name will then be magnified and sanctified, for His name will be magnified and extend to all that exists. And this is what it says: 'I will sanctify My great name which was profaned among the nations, which you have profaned in their midst, and the nations shall know that I am the Lord.' (Ezekiel 36:23)."