IMO it was definitely more than ‘a little tug’, and I think replays clearly show that, but guess we’ll have to agree to disagree.
Either way, I think the ‘pearl clutching’ is because pulling hair is seen by our society as a ‘low’ thing to do. Like a less extreme version of Suarez’ biting, which I’m sure did little to no damage either. It’s all subjective though - some people thought the biting wasn’t that bad, some think the hair pulling isn’t that bad, I think they’re both embarassing behaviour from a grown man.