Overall, I agree with your reaction to Gordis’ piece and with the overall tenor of the comments (except for the first, which I think is reprehensible). I would only add a further reason for caution, lest we pat ourselves on the back overly much.
I have just completed a four month sabbatical in the US. One thing that struck me was how incredibly self-satisfied large swaths of American Orthodox Jews appear to be. For many of the people I met (though assuredly not the majority, I hope), Israel is a place to visit, without really engaging or encountering it; to use, without internalizing; to pine for in low keys on Tisha B’Av, without putting Aliyah on the agenda. One indicator of this attenuation of relations is the Hebrew illiteracy (both in speaking and writing) that marks the overwhelming majority of Orthodox Jews (including rabbis and Lamdanim). Without a common language, how can there be a common cause?
So, while we share the secret of our blessed solidarity and sense of peoplehood with other Jews, it behooves the Diaspora Jewish Community to check itself, as well.
To his credit, R. Adlerstein's response to my remarks (in a private note) were both open and appreciative.