Why? What makes an expensive murder machine manufactured in Brazil or Sweden more morally acceptable than a murder machine manufactured in the USA?
FWIW, the Super Tucano and Gripen are more "morally acceptable" in that they are not power-gap level planes. The F-35 was basically designed from the ground-up to molest denied airspace and violate every rule of diplomatic exchange. The Super Tucano is useless outside COIN operations, and the Gripen is decidedly a defensive fighter and not a strike fighter.