"And you could hear it in their voice - the racism," Gilbert said. "It wasn't even really about the issue, and that's what really got me, because they went to who they really are, some of them."
This week, James said he did not regret his comment about Trump.
"Me and my friends call me that all the time," James said during a news conference on media day. "I'm not his friend, though. He's not my friend. No, when I woke up and saw what he said about Steph Curry. First of all, it's so funny because it's like you inviting me to your party, right? As a matter of fact, it's not like you invited me.
"It's almost, like, 'Hey, I'm not going to be able to make it. I'm not coming and then you would be like, 'LeBron, guess what? You're not invited.' I wasn't coming anyways, so that was funny to me when I woke up and saw that. So, my first initial response was, you bum."
James also commended NFL players for protesting after Trump said owners should fire any players who kneel during the national anthem.
Gilbert has ties to Trump, from his Quicken Loans mortgage lending company donating $750,000 to the president's inauguration party. But Gilbert said in a statement this week that he supports both political parties.
"Our interests are in the policies at the federal level, and not the politics surrounding the elections," he said. "We have often supported both political parties in the same election so that we have the ability to impact positive change, regardless of who occupies the offices.
"Our focus with any office-holder or politician is about the communication of the still substantial needs of our former rust-belt cities that are now finally beginning the road to recovery and growth that other parts of America have been experiencing for a long period of time."
