When signs of antisemitism began to emerge in her community, a mother reached out to ADL, having learned the power of community activism and ADL’s impact from her father. On his first day of tennis practice, a freshman Jewish student at a high school in the suburbs of Philadelphia heard antisemitic “jokes” from the court next to him. He told his teammate, also Jewish, to knock it off, and that his words were antisemitic. Dorothy Potash, mom of the freshman and a…