There was only one book for sale on Miriam Libicki’s table at the Vancouver Comic Arts Festival (VanCAF) last month. But I Live: Three Stories of Child Survivors of the Holocaust is a collaborative project pairing graphic novelists with survivors, telling their stories in poignant detail. Days after the event, VanCAF announced it was banning Ms. Libicki in a statement referencing “important public safety concerns” about an exhibitor’s prior role in the Israeli army. The board apologized “for the harm we have caused by our negligence” in allowing her to participate. While Ms. Libicki was not named in the post,...