popa_bar_abba: “they’re uncomfortable with the ethnic/racial element of Judaism. “
I believe they are uncomfortable with the religous element of Judaism. Gairus is basically naturalization. When you become a citizen you give up your previous loyalty, adopt the culture of the new country. In “normal” countries (US, France, Britain), becoming a citizen does not require you to adopt a religion. Frum Jews regard being Jewish as a matter of religion (being Jewish is about mitsvos), and secular Diaspora Jews see Jewishness as ethnicty (being Jewish is about gefilte fish and bagels), whereas zionists see being Jewish as being about being a loyal supporter of the State of Israel which is why they want the process of becoming an Israel, which includes geirus, to focus on zionism rather than Torah.