Turkey coach Fatih Terim has criticised home fans who whistled during a minute's silence designed to commemorate the victims of the Paris terror attacks in the friendly against Greece.
Some home fans also jeered the Greek national anthem during Tuesday's 0-0 draw in Istanbul.
According to reports the majority of the fans were actually chanting an anti-terror slogan directed at those who killed 129 people in the French capital last week.
While reports also say that the whistles were a response to the relative lack of coverage for terror attacks in Turkey, including last month's suicide bombings in Ankara.
Terim, though, said there was no excuse for not staying silent.
"We are doing a minute of silence for the victims and we cannot bear this even for a minute for God's sake," he said. "We cannot even stand still and be respectful for a minute. Believe me, and I am very open now: We cannot explain this to anyone."
While a moving tribute was paid before France's friendly in England, Terim highlighted that two of Tuesday's other matches -- Belgium-Spain and Germany-Netherlands -- were called off due to fears of terrorist attacks.
"This is not a child's game," the former Galatasaray manager continued. "This is very serious. Terror threats are very serious and we must think thoroughly about this.
"In such a situation, on the contrary, we shall not just sit and watch, but we shall not act like this as well. This is not us.
"If we act accordingly we can prevent sport becoming a victim of terror ... Sport is one of the most important instruments that can be used for peace and fraternity."
Greek Prime Minister Alexis Tsipras and his Turkish counterpart Ahmet Davutoglu had watched the game in the stands together in what was the first game in eight years between the two neighbouring countries.
Terim said the reaction to both the minute's silence and the Greek anthem was damaging to the country's image and that Turkey's fans should not do things that they would not like to endure themselves.
"This is a national anthem," the ex-Fiorentina and AC Milan coach said. "Would we like our anthem to be whistled?
"Please... what is happening to us? One of our biggest traits has been respecting our neighbours... this is not us.
"I, personally, have grown up in an area where being neighbours mattered a lot. If this happened to us we would be devastated."