Referee sees it as an elbow to the throat, which is well above the nipple line obviously, and thus as dangerous play warranting a Red. I have no issue with that.
Yes, the 'tackle' attempted by the Perpignan player was a smother tackle we often see on players fielding a high ball, trying to prevent a quick offload by the ball catcher and using momentum to drive them back. 99 times out of 100 we see a ball catcher being driven back, the crowd roars and the next phase is set up.
As far as I'm concerned, Parisse goes above and beyond bracing for impact. He has time to size up his opponent, move his shoulder and elbow into position and drives forward, high and with force, into his oncoming opponent.
Had Parisse simply fielded the ball, tucked his arms into his body and taken the hit - which is what I would call bracing for impact - we may have had a totally different outcome. But what I see here is Parisse moving into his oncoming opponent dangerously.
Red a good call for me. But I may be on my own here.