So you seem to agree that people weren't arguing that what Robinson wrote should be defended, indeed there seems general agreement that it was offensive and wrong.
What they were doing was saying that it was not necessarily the right thing to suspend him for saying these things when he was an immature teenager, who may have different views now (of course his views may not have changed, and if that was proved he should never play for England again).
I don't therefore think that anyone saying that they don't think suspending him in this case is a racist apologist unless at the same time they also defend what he said.