I disagree with the prognosis but not the symptom. I’m not from your neighborhood and have been all over the country and all over the internet. People are pre-disposed to being very anti-Semitic when there are no Jews about, or when they have never even met, seen, or know a Jew. It doesn’t matter if we exist or not, people have varying levels of mental issues.
But as to the substance of the letter. I wholly agree with the problem. Now that I’d like to be more Jewish, the email lists I find, the magazines I see are preposterous. With each one getting worse. I don’t need a Muslim Syrian Haggadah, and other unmentionables. There’s no reason to spend my time reading things I could waste my time with by watching Cable Television. Maybe this is why we’re losing people, because if you’re not a Bernie Sanders type, there is no point in being on any non-religious Jewish list.