I don’t know how one could read Romans 9-11 and come away with equating “Israel” with “Gentiles.” In fact both are clearly distinguished in the above chapters.
http://www.biblegateway.com/passage/?search=Romans+9&version=NKJV
http://www.biblegateway.com/passage/?search=Romans%2010&version=NKJV
http://www.biblegateway.com/passage/?search=Romans%2011&version=NKJV
Keep on reading the next post after yours.
Of course they are distinct and different. It takes a complete distortion of scripture to say otherwise.