"It is Angie and I" is correct. When a sentence is put together this way, "It is ______," you always use the subject form of the pronoun. For example, "It was he who did the dishes" is right. "It is...
No, Jhangis are a very respectable community and they are no less than other communities. In fact, Punjabis don't give much importance to communalism among themselves and are very proud to be Punjabi.