Thought it was a yellow on first look, but looking at the slo mo replays and some stills I can see why they said red. I don't think they'll over turn it now, precisely because arsenal have made such a big deal out of it and there isn't enough to suggest it was actually wrong. The decision itself, yellow or red, you can justify either as it sits somewhere in-between and in the 'what ifs'. There are many tackles like that every week and very few are given as red, but it's at force and and it's studs. Could have put the lad out of action for a while and it is the intent that is key, no regard for player safety and was very deliberate, so the referee has all he needs to justify it. That Skally character is fast getting himself a reputation as a proper little shite isn't he, wasn't he booked before he even made his debut for being a snide bastard?
But regardless, as others have said, a siege mentally can work wonders but arsenal and arteta are just taking it to extreme levels and inverting it to almost flat earther levels, to the point that that fan base are getting all whipped up every single week about something and can't see anything other than their own opinions.
Surrounded the referee too, they need calling out for that one. As for the fans abusing Oliver, I've seen some shocking decisions and I've questioned the bias of many a referee. Game management is absolutely a thing and there are other factors involved for officials beyond what is the actual correct decision. Clattenburg and others have admitted as much. But to threaten someone's life, their family and kids, regardless of club and colours it's unacceptable. What arsenal and arteta need to accept is that, regardless of the decision, their behavior is helping morons online justify their aggression. They have a responsibility to act and behave in a way that shows professionalism and respect, even if it was incorrect.
What I would say from an officiating point of view is, if that is the standard, let's see it every week with some consistency then please. Clarify why it was deemed a red and let people know. Even in real time maybe. That works shoot down a lot of the theories before they take hold. We see balls kicked away now not being carded, for example, and they're setting themselves up for controversy.
It's the symptom of Arsenal's whole reason for failure. We've felt the same before, but the attitude that got us to rise above it and actually win, was to be better. Be so good that poor decisions can't impact a game, don't moan, don't cry. I get it's upsetting to lose the league every year but honestly to blame everyone else is a shyster's trick and, simply, untrue.
They won the match, they can survive a few games without that player as he's hardly key, so take that and maybe focus on a bit of self control, from the players on the pitch to the keyboard warriors hiding in their bedrooms. Because arsenal now have a reputation, and that could well feature in the back of anyone's mind, including the officials, as they're human too.