The fullback was dismissed after he made contact with the head of Ireland fullback Hugo Keenan.
England captain Owen Farrell was left baffled saying: "What? A red card?' in a shocked tone.
One fan wrote: "Rugby is Dead! What can Steward do there?! That is a pure collision!."
A second commented: "How on earth is that red card? Utterly absurd! What exactly was Steward supposed to do: dematerialise? IRLvENG."
Another said: "Rugby is done, Steward tried to turn out of contact."
Andy Goode added: "Awful call from Jaco Peyper, that’s a rugby incident never a red card for Steward."
Freddie Steward red card
Fans have picked an all-time ‘abolute b***ard’ XV of most disliked rugby union players
15 Israel Folau (Tonga)
14 Yoann Huget (France)
13 Tana Umaga (New Zealand)
12 Brian Lima (Samoa)
11 Sevu Reece (New Zealand)
10 Owen Farrell (England)
Could it be anybody else? Farrell fits the label “our guy” better than most, meaning you love to hate him unless he’s in your squad. Then you’d go to the end’s of the earth to defend him. The England captain, also known as 'Shoulder boy' for his high tackling, does himself no favours with his poor tackling technique.
Owen Farrell of England takes a penalty kick during the Autumn International Series match between England and New Zealand at Twickenham, London on 19 November 2022 (Photo: Micah Crook/PPAUK)
9 Mike Phillips (Wales)
1 Joe Marler (England)
2 Dane Coles (New Zealand0
3 Richard Loe (New Zealand)
4 Bakkies Botha (South Africa)
5 Thomas Lavanini (Argentina)
6 Peter O'Mahony (Ireland)
A flanker that plays on the edge and never fails to get under the skin of opposition fans. His late hit on Stuart Hogg and foul-mouthed war of words with the Kyle Sinckler during the 2019 Six Nations did him no favours. The sort of player you love to have, but also love to hate.
Peter O'Mahony of Ireland during the Summer International match between England and Ireland at Twickenham Stadium, Twickenham, London on the 24th August 2019. Photo: Phil Mingo/PPAUK.