You could remind them they wouldn't have food either if not for Friz Haber, the ethnic kraut, who made possible the survival of more than half the world's current population, or something like that, with his NPK. Combined with Rudolf Diesel's stuff, a field sure can yield.
Every culture has invented stuff that, when combined, makes for the greater good of all. They're welcome to honky stuff and we, in turn, thank them for the goat meat marinade which they innovated.