In December, the boxing legend issued a statement criticizing Republican presidential candidate Donald Trump's proposal to ban Muslims from entering the United States. Ali called on fellow Muslims to "stand up to those who use Islam to advance their own personal agenda."
Ali, who died Friday at 74, endured public scorn when he joined the Nation of Islam as a young athlete. Decades later, long after he had achieved worldwide renown, he kept advocating for Muslims in the US who felt their religion made them political targets.
Ali's lesson "from that difficult period is that although he was criticized and marginalized for his beliefs, there were many people who were not Muslim that came to his defense," said Walid, who is black and Muslim.
"There are people in America today of goodwill who are not Muslim who are willing to stand with us. But we have to be the ones who have to be courageous and stand up for ourselves and be unapologetically Muslim and American."
Muslims in particular praised his humanitarian work, which included lending his name and time to numerous relief campaigns and helping to secure the release of American hostages in Iraq.
Born Cassius Clay in a segregated Louisville, Kentucky, Ali angered many Americans when he refused to fight in Vietnam. But in 2005, he was awarded the Presidential Medal of Freedom by President George W. Bush.
Lyndon Bilal, commander of the Muslim American Veterans Association, said through his "love, character and courage," Ali had "always been a friend of soldiers and America.
