'Misguided' isn't the word I'd use,

but he's being more polite than I:

It’s what I imagined I would read when I opened “A prayer for Squirrel Hill—And for American Jewry” from Franklin Foer, whom I know somewhat and have always respected. Instead, I read this: “Any strategy for enhancing the security of American Jewry should involve shunning Trump’s Jewish enablers. Their money should be refused, their presence in synagogues not welcome.”

In other words, more than half of my Shabbat morning congregants, and in some more traditional synagogues, almost all of them, should have the doors barred against their entry. Jews who make minyans, pay shiva calls, underwrite nursing homes and kindergartens—people who make Judaism possible, with their flawed but real human presence, for other people—should be cast out of our midst because of the levers they pull in the privacy of a voting booth. And what, after all, would a Jew who fled from Iran know about anti-Semitism—or protecting the Jewish community?

I'd say more, but the more I think about this the more pissed I get, and the more likely my language would degrade.  Badly.  Go read.  And reflect on the level of stupid and Trump-hatred required for this.