Mu'awiyah (May Allah be pleased with him) reported: The Messenger of Allah (saw) said, "When Allah wishes good for someone, He bestows upon him the understanding of Deen." [Al-Bukhari and Muslim]. reference : Book 13, Hadith 1 Arabic/English book reference : Book 13, Hadith 1376
Even though it's hard but I forgive them. Don't hold grudge because it will consume you too. Instead let's pray hope that Allah will change their heart.