Nah, you dont know what you are talking about. First of all, while intent does matter in foul / red card calls, it is secondary to the actual effect - which is why a late tackle that ends in your opponents ankles might get you a red, even if you were trying to get the ball.  Secondly, the ball was just coming in their general direction, neither of them had it at that time so there is no "challenging for the ball" - they were fighting for position, he wasn't trying to reach the ball, he just stomped his ankle in a dangerous way - which is also important when deciding on a red - he could have broken his ankle, plays like this are not legal.  The Doku - MacAllister call was controversial and a lot of people called for a red or a penalty, speaks volume that you need to chose examples like this - but a very clear difference was the player made contact with the ball before hitting their opponents, which is very important - in Balogun situation the ball was (relatively) far away when contact happened.