"become hardened" - Translation from English to Arabic

In addition, the deportation of persons who have become hardened criminals to lands they do not know as home is further rocking the social and economic fabric of our democracies.
وفضـلا عـن ذلـك، أن ترحيل عتاة المجرمين ﻷراضٍ لا يعتبرونها وطنهم يفتت النسيج الاجتماعي والاقتصادي لديمقراطياتنا.