Irving initially failed to apologise for a social media post about a book and movie with alleged anti-semitic views, nor "unequivocally say he has no anti-semitic beliefs".
The 30-year-old, who was handed a minimum five-game suspension by the Nets, belatedly issued an apology on Instagram after NBA Commissioner Adam Silver had expressed his disappointment at the lack of one.
James previously said he did not condone the behaviour of his former Cleveland Cavaliers team-mate, though he now feels Irving has educated himself and should be allowed to return to the NBA court.
"I told you guys that I don't believe in sharing hurtful information, and I'll continue to be that way, but Kyrie apologised and he should be able to play," the Los Angeles Lakers star posted on Twitter on Thursday.
"That's what I think. It's that simple. Help him learn – but he should be playing."
James also suggested the demands on Irving, who has reportedly been presented with a list of requirements to see his suspension overturned, are "excessive".
"What he's [been] asked to do to get back on the floor I think is excessive [in my opinion]," he said. "He's not the person that's being portrayed of him."