There are 2 issues over here 1st getting pregnant without being married and second is living or marrying a gora. (if i am not mistaken)
getting pregnant without being married to the father of baby is HARAM . it's ZINA , you know zina is Gunha-e-Kabeera . It a big big sin. No excuse in this world can justify such act. What is the kusoor of that innocent baby , u know how he/she will be taken in society ?
second one - I think it's a personal decision but again one shd not live together without being married / nikahfied. other than that as far as my knowledge about islam is it permissable to marry an ahal-e-kitaab.
...allowed to marry ahl e kitab women, not men.
marrying a gora is not an issue if he is a muslim
getting pregnant without being married is an issue from a religious perspective, no one is arguing with that. however we dont know if there was not some king of religiously acceptable 'marriage' there..
lastly, the discussion ios not just about religious view or how the child will be treated in desi community, but could the child be treated well in general society in US and can a single mother have a good life