The political mess that Britain created in the aftermath of WWI remains today. The competing agreements and the subsequent countries that were created to disunite Muslims from each other led to political instability throughout the Middle East. The rise of Zionism coupled with the disunity of the Muslims in that region has led to corrupt governments and economic decline for the Middle East as a whole. The divisions that the British instituted in the Muslim world remain strong today, despite being wholly created within the past 100 years.
The differences between Iraqis, Syrians, Jordanians, etc. were entirely created by the European colonizers as a method of dividing the Arabs against each other.
Now is time for EU to pay the same price.