How to make any sense of religion and dead gods in Baldur's Gate 3?

Question

In the previous games of Baldur's Gate, the central main story is that the god Bhaal is dead and his powers are scattered among his semi-mortal children. This is central to the lore of those games. Less important to the game, the god Myrkul was dead too.

Baldur's Gate 3 supposedly taking place around 100 years later and now we suddenly have Bhaal and Myrkul worshippers everywhere. In fact those gods are now apparently alive and kicking, for reasons unexplained. As evident in the end of Act 2 in the game where you confront a trio wielding the divine powers of Bhaal, Myrkul and Bane. Powers they supposedly wouldn't have if the gods were dead.

Additionally, the recurring bad guy Sarevok makes a reappearance in BG3 which is consistent with BG2 since he was actually resurrected by the protagonist there, as part of the Bhaalspawn conflict. And now he worships Bhaal, who he clearly ought to know is a dead god, since that was the very premise that made it possible for Sarevok to rise from the dead in the first place.

How does this complete inconsistency in the storytelling and game lore make any sense? I'm mostly interested in the in-game lore of Baldur's Gate, but answers addressing the "official" status of these gods as per Forgotten Realms lore are fine too.

Answer 1

From the Forgotten Realms wiki entry:

With all of his children dead, all of Bhaal's essence was freed, allowing for his resurrection. Bhaal was revived, and reclaimed the murder domain from Cyric. However, the Lord of Murder was no longer a true deity, and was instead a being of quasi-divine status. As with Bane and Myrkul, he was effectively a mortal. In 1492 DR, the city of Baldur's Gate saw a spate of murders by cultists of the Dead Three.

As regards Myrkul, the FR wiki seems to indicate that he never entirely died.

As Myrkul's avatar was slain, just before the majority of his power was transferred to Cyric during his ascension, the last remnants of his energy entered into the Crown of Horns, which was locked away within a vault inside Khelben "Blackstaff"'s tower. The ancient Netherese artifact held what was left of his personality and memories for a decade, after which it reformed its physical form on Toril. By Myrkul's lingering will, the crown transported around Faerûn to a number of hosts, allowing the god to maintain his influence among the mortals, as he ever did, sowing dissent and fear via suggestion and influence. Among those that wore the crown were Aumvor "the Undying" and the Yuan-ti pureblood, Nhyris D'Hothek.