Indeed, the Sea Giant Clan has made significant contributions in subduing the sea areas and protecting the Sea Clan. Thus, the power of faith accumulated over countless years is also quite substantial.
If it weren't for this, Tang San would have long since stopped tolerating them and would have directly taken their lives. However, for their own selfish desires, the Sea Giant Clan disregarded the immense benefits the Sea God brought to the Endless Blue Ocean and attempted to suppress or even imprison Tang San on two occasions. Punishment was inevitable.
Of course, Tang San wouldn't exterminate the Sea Giant Clan. As one of the most powerful races of the Endless Blue Ocean, their existence greatly benefits the balance of the Endless Blue Ocean. Had it not been for the Central Pillar King of the Sea Giants again initiating targeted actions against him, he might have even supported them, to see if he could help the true birth of a King for this clan by the time of his departure.