Translate the following English sentence to French:
"What lies behind the incident at Dover, however, is that we have to recognise the inability that Europe has shown to date to fully understand the phenomenon of an ageing population. What this means is that Europe must have its own immigration policy and also the ability to work together on this immigration policy with the home countries of those who wish to come and work in Europe."
Cet incident nous a tous indignés, mais il faut reconnaître que ce qui se cache derrière, c'est l'incapacité que montre encore aujourd'hui l'Europe à comprendre que, compte tenu du vieillissement de sa population, l'Europe doit définir une politique d'immigration et se mettre d'accord sur cette politique d'immigration avec les pays d'où proviennent ceux qui souhaitent venir travailler en Europe.