Looks like the stewards did what they could. Why should they take any blame? Punish the guilty and then fine both clubs and get them to put their houses in order.
( maybe arm the stewards with tazers and pepper spray)
As part of any investigation, they will no doubt look at whether the stewards followed the correct procedures for this kind of incident - if they didn't then they should take some of the blame.
The club has a responsibility for the safety of other fans, and tbh this could have turned really quite nasty if a few more of the scrotes had been more prepared to get involved.
Whether this is stewards or dedicated security is one for them to make the call, but trouble like this inside a stadium is not great.