PAS' Shah Alam MP Khalid Samad said the Perkasa president was being disrespectful and "deliberately provocative", and warned that the opposition bench may move a motion to reprimand Ibrahim.
"Maybe we will move a motion. I think we should... this is his attitude, encouraging Malays to disrespect non-Malays," he said in the Parliament lobby.
"A fellow MP has died and it is just one minute of mourning as a show of respect, but he continued to sit and talk loudly over the phone, apparently to show his spirit as a Malay champion."
Khalid pointed out that it was clear to all the MPs that Ibrahim was on the phone, as only his voice was heard while everyone else was honouring the minute's silence.
"He said at the end he stood up, but that was only the last part, one or two seconds. How important is this phone call? We all have handsets. I personally turned around to see him sitting down and talking... he didn't stand up when he should have," he said.
Rule against using handphones
Johari Abdul (PKR-Sungai Petani) noted that not only was Ibrahim disrespectful to Chong, who died in a motorcycle accident on Saturday, but the independent MP also did not heed the speaker's orders and went against House rules which prohibits the use of handphones.
"This shows he does not respect the speaker and our late colleague. Even if he is an Muslim and a Malay, it is our values as Malaysians to respect each other.
"He must remember, as Perkasa president his actions show as if he does not respect anyone who is not Malay and Muslim," he said.
Dr Hatta Ramli (PAS-Kuala Krai) said the Pakatan Rakyat does not condone such behaviour and strongly criticises Ibrahim's actions.
"We want to distance ourselves from his behaviour, which clearly does not reflect the values and mannerisms of Malay culture... we do not want to be related in any way to the culture brough about by Ibrahim Ali (left) and Perkasa," he said.
Earlier, Gobind Singh Deo (DAP-Puchong) attacked Ibrahim in the House right after the minute's silence after question time at around 11.30am, slamming the latter for not respecting the mourning period that is a traditional show of respect for MPs who die while still serving their term.
Wee says skin colour not a factor, but scared to name Ibrahim
Ibrahim stood up to defend himself but speaker Pandikar Amin Mulia told both MPs to sit down and let the matter rest.
The minute's silence however was supposed to have been done at the start of today's sitting, right after the opening prayers and before the start of question time.
Pandikar later pointed out that the minute's silence would be held at the end of question time.
Ibrahim's antics also earned him condemnation from the government bench, in form of Deputy Education Minister Wee Ka Siong.
Unlike the others, Wee however refused to explicitly name Ibrahim.
"I'm disappointed with the controversial MP, neither from BN or Pakatan, who kept talking on the phone when the house was showing respect to the deceased MP.
"An MP must show respect to his deceased colleague without looking at one's skin colour," wrote Wee on his Twitter page. - Malaysiakini