what is the theme of the film?
The theme revolves around  portrayal of Jewish characters' roles in modern film as well as of how male nurses are portrayed in media.
Meet the Parents
The cultural differences are often highlighted, and Greg repeatedly made aware of them. This serves to achieve comedic effect through character development and has also been commented upon as being indicative of thematic portrayal of Jewish characters' roles in modern film as well as being a prime example of how male nurses are portrayed in media. 
what is 'meet the parents'? A comedy film. when did this film release? 2000. who is the producer of this film? Nancy Tenenbaum .
wiki:20198812
Meet the Parents [SEP] Themes
Such stereotyping is due to a presumption that a man would prefer to be a physician but is unable to become one due to lack of intelligence or non-masculine attributes. Jack is often seen openly criticizing Greg's career choice per his perception of nursing being an effeminate profession. In their book "Men in Nursing: History, Challenges, and Opportunities" authors Chad O'Lynn and Russell Tranbarger present this as an example of a negative portrayal. Commenting on the same issue but disagreeing, Barbara Cherry in her book "Contemporary Nursing: Issues, Trends, & Management" called the portrayal of Greg as a nurse "one of the most positive film portrayals of men who are nurses" and commented that Greg "humorously addresses and rises above the worst of all stereotypes that are endured by men in this profession." Sandy and Harry Summers in the book "Saving Lives: Why the Media's Portrayal of Nurses Puts Us All at Risk" postulate that Greg's character, although intelligent and firm in his defense of his profession, "might have done more to rebut the stereotypes" while also reporting that "some men in nursing" expressed their opinions that it would have been better to not present the stereotypes at all.