While a few other whites in Montgomery supported the boycott, Graetz was the only white clergyman who did so. He and his family were ostracized by other whites and suffered several episodes of harassment: their tires were slashed, sugar was poured into the gas tank of their car, they received death threats, some of which were directed against their children, they were arrested, and bombs were planted at their home on three occasions; the largest, comprising 11 sticks of dynamite, did not explode.