I've only seen it a couple of times. I don't find such injuries pleasant to watch over and over.
It seemed to me to be a freak of timing combined with a stud getting stuck in the turf.
The type of challenge is executed regularly, not quite in full control of the ball, slightly on the stretch with little control over where your leading foot will get planted - but it's coming down with momentum and a lot of weight behind it.
It's usually completed without incident, often without contact or minimal contact. At worst, studs scraped down the calf or catching the heels of an opposing player. You'd say it was clumsy but never describe it as dangerous play in these situations.
If the timing was a fraction of a second different, Soumare's challenge would have had a totally different outcome and probably wouldn't have been given a second thought.
If it had passed without incident nobody would have been describing it like 'he flew into that challenge' or 'a bit reckless but got away with it'
The outcome has determined the red card. Some will disagree, but injuries happen and in my opinion it doesn't have to automatically mean that a foul was committed or that the play was reckless.