Do they? I think the world, England fans in particular, universally accept red card as the right outcome.
You could easily align that kick to reckless though:
When Beckham kicks the back of Simeone's leg he falls backwards which could have caused danger or consequences to Simeone an example he could have banged the back of his head had he not broken his fall..easy
That said I still think Beckham deserved a red card and I reckon he would still get one today.
Anyway, digressing as usual!
It seemed to me that you were stating that factually for CRUEF it must be a challenge for the ball which is in fact not the case, in law. I appreciate this is your general interpretation of these situations (and I'm not a million miles away in that respect) but feel we do need to be clear that the law does allow for CRUEF judgement in situations where a player commits a physical offence against an opponent.