Was Imam Hussain(as) justly killed???

According to Wahabis Imam Hussain (as) was justly killed by their Imam Yazeed [la] 

Abu Bakr Muhammad bin Abdullah ibn al-Arabi al-Maliki (d. 543 H) was one of the famed Sunni scholars. Imam Jalaluddin Suyuti records about him in Al-Jame al-Saghir, Volume 1 page 365:

فقد ألف كتابا في شأن مولانا الحسين رضي الله عنه وكرم وجهه وأخزى شانئه زعم فيه أن يزيد قتله بحق بسيف جده نعوذ بالله من الخذلان

"He wrote a book about Hussain (may Allah be pleased with and disgrace his opponents), he claimed that Yazeed killed him justly by the sword of his grandfather. We seek refuge in the Lord of the forsake".