Referee Robert Jones disregarded Leeds midfielder against the tip of the primary half of at Portman Road following an off-the-ball incident with Ipswich left-back Jonas Knudsen.
Footage seems to turn O’Kane strike Knudsen with an arm however Christiansen claims his guy was once provoked.
“The opponent went to him, they touched each other,” he mentioned.
“It was him that came and provoked him.”
He added: “I’ve noticed a video.
“My son additionally noticed there and k I consider my son and the images.
“From the viewpoint the place the digital camera is there is not any signal of doing it.”
When requested if he plans to appeal to the FA, Christiansen mentioned: “I’m hoping so, there’s no proof that he is going to him, he simply confronted him and when there’s a touch.
“It’s a provocation, he sought after that and he were given that. The referee fall into that.”
Leeds have been on best sooner than O’Kane’s dismissal however it was once Ipswich who claimed all 3 issues due to Manchester City loanee Bersant Celina’s second-half function.
Christiansen believes his facet would have gained had they now not misplaced O’Kane, and he mentioned: “At the half of time my message was once the similar, we need to take the 3 issues and we believed in that.
“That was once the spirit of the group, preventing the closing 48 mins of the second one half of however was once now not sufficient, each and every performed did what they’d and for me there is not any complaining.
“If we play 11 in opposition to 11, we win needless to say.”
He added: “I’m happy with the gamers, everybody can see we did to not need to lose this sport.
“It was once a pleasing function however most likely we will be able to shield that higher.”