"The border between Syria and Turkey is used for the sale of oil from Syria and at the same time for transportation of militants and arms supplies. Thus, the border [crossing] is absolutely accessible, and Turkey's position with regard to Daesh is dual. It’s high time for Europeans to bring Turkey to account," Dominique Trinquand, who is also a military expert and an international relations consultant, stated.
According to the retired general, Ankara is using ISIL as a pretext for defeating the Kurdistan Workers' Party (PKK), which aims to create an independent Kurdish state within Turkey.
"However, the fact that Turkey helps Daesh, allowing the transfer of militants across the border and enriching Daesh owing to oil trade, is an absolutely scandalous manner of behavior," Trinquand stressed.
Russia-Turkish relations suffered a severe setback after Turkey downed a Russian Su-24 attack aircraft on November 24 over Syria for an alleged airspace violation, which Moscow has denied.
On Wednesday, Russian Deputy Defense Minister Anatoly Antonov said Turkish President Recep Tayyip Erdogan and his family were directly involved in the illegal oil business conducted by ISIL.
Erdogan responded to Russia's accusations by claiming that he would resign should indisputable evidence on the matter be presented.
