Re: Ivanhoe - as it's set during Richard I.'s lifetime, it's more than a century before the Jews were officially expelled from England (happened under Edward II, though Edward I already started the process). I am not sure, though, whether I would call this description:

with the hero and the woman realizing they can't be together because of their religious differences

accurate, considering Ivanhoe is engaged to Rowena the whole time and considers Rebecca a non-option even if he weren't precisely because of her being Jewish. Also, Rebecca's father Isaac, as opposed to the film versions where he's a dignified nice man, is the repulsive miser of antisemetic stereotype in the novel. In short, no brownies for Scott, because the cliché of the beautiful Jewess in love with a Christian and her repulsive father predates him by centuries.