As Daniel S. Mariaschin approaches retirement after 53 years in Jewish advocacy, including 37 years at B’nai B’rith International where he has been CEO since 1999, he is very concerned about Jewish wellbeing.“As a community, we’re facing challenges to the extent and the level that we’ve never faced before,” he told JNS.Mariaschin is not retiring out of exhaustion or intimidation of playing Whac-A-Mole with global Jew-hatred, especially over the …