Not sure why tax-fraud (4m Euros worth) gets a pass compared to other forms of crime? He's obviously an amazing footballer, probably the best ever, and wonderful to watch. Does that mean he gets to do a free crime or two?
The point was that it's not entirely correct to portray him as an absolute model of what a footballer or human should be. Pointing out that he committed a major financial crime isn't finding a stick to beat him with, it's a fact, and relevant to the context.
Incidentally it's not an allegation, he and his father were found guilty and convicted.