Let us see an authentic narration in this regard

311 – ابن محبوب، عن عبد الله بن سنان قال: سمعت أبا عبد الله (عليه السلام) يقول:
ثلاث هن فخر المؤمن وزينه في الدنيا والآخرة: الصلاة في آخر الليل ويأسه مما في أيدي الناس وولايته الامام من آل محمد (صلى الله عليه وآله) قال: وثلاثة هم شرار الخلق ابتلى بهم خيار الخلق: أبو سفيان أحدهم قاتل رسول الله (صلى الله عليه وآله) وعاداه ومعاوية قاتل عليا (عليه السلام) وعاداه ويزيد بن معاوية لعنه الله قاتل الحسين بن علي (عليهما السلام) وعاداه حتى قتله

Ibn Mahboon from Abdullah bin Sanan who said that i heard Imam Abu Abdullah asws saying

There are there things of pride for momin, and (they are) beautification for him in this world and the world here after

Salat in last part of night; Disappointment which he gets at the hands of peopl; Wilayat of Imam from Aal-e-Mohammad

He said: and there are three amongst the worst of creation who hurt the best of creation

Abu Sufian, who fought Holy Prophet asws and was his enemy; Mawia who fought Imam Ali asws and was his enemy; Yazid curse of allah be on him, who fought Imam Hussein asws and was his enemy till he killed him 

this narration clearly shows that yazid lanatullah was clearly involved in Martyrdom of Holy Imam asws


1- Al Kafi, 8/234

2- Jami’i Ahadeeth al Shia, Al Barudardi, 7/101

3- Musua’at Ahadeeth Ahlulbait, Hadi Najfi, 5/306 ; 8/333 ; 4/445

and He said

الرواية صحيحة الإسناد.