User blog comment:Derax-Pagani/Chapter 509: Kagura vs. Larcade Review/@comment-3285005-20161108025138/@comment-99.13.69.171-20161111130850

(Sighs)

It is Hatred, not Anger that triggers the curse, there is a difference between the two, besides, Hate is the opposite of Love. And also, Nirvana arc showed that there is such a thing as Righteous Anger which majority of Fairy tail has.

As for Truth, I was referring to the first encounter with Galan, not when Meliodas got his power up.

Zeref, Acnologia, Spriggans and the GOI are not the only ones that can take them down, even elite Fairy Tail members and Dragons are strong enough to fight as well.