Merits of Syedna Imam Hussain (MAy Allah bless Him and his family with peace) in the light of Quran

Then, as for those who believed and did good works, unto them will He pay their wages in full, adding unto them of His bounty; and as for those who were scornful and proud, them will He punish with a painful doom. And they will not find for them, against Allah, any protecting friend or helper.

An-Nisa 173

Comment
I personally feel that this verse is a scale.The first part of the verse is the merit of Syedna Imam Hussain (May Allah's blessings be upon Him and His family) who did righteous acts throughout His life and the second half is declaring the end of Yazid (May Allah's curse be upon Him forever)
who became so proud and so endorsed in the ecstasy of power and government that he made the heavens cry on his cursed evil action.