Sforno on Deuteronomy 32:38/ספורנו על דברים ל״ב:ל״ח

1יקומו ויעזרכם, “let them arise now and help you!” G’d will follow up by mockingly telling the Jewish people that now the time had come for them to appeal to the gentile nations whose lifestyles they had shared to help them against the judgment being visited upon them by the G’d, the One whom they had forsaken. They had assumed that by assimilating during their exile, these host nations as well as their gods would protect them.