Shared ground
The verse reports what the assassins say and do, not what God approves. They physically present Ish-bosheth’s severed head as proof, and they speak to David as in Hebron. Their words try to frame the killing as both politically helpful (“your enemy”) and religiously meaningful (“Yahweh has avenged…this day”).
A major theme in Samuel is how people attach God-language to their choices, including violent choices, and try to control how leaders interpret events (compare how David is repeatedly tested by violence done “for his benefit”).
Where interpretation differs
Some think the killers are mainly trying to win a reward and protection, using pious language as a sales pitch with little concern for truth. Others think they may be echoing what many Israelites assumed at the time: that the fall of Saul’s house was God’s doing, so this act would be seen as part of that larger turn.
Another point of uncertainty is their claim that Ish-bosheth “sought your life.” Some read this as propaganda meant to justify murder. Others take it as a broad label for being on the opposing side in a civil struggle (even if Ish-bosheth personally is not shown hunting David in this chapter).
Why the disagreement exists
The narrator in v.8 does not pause to evaluate the truth of the assassins’ claims. The verse records their speech, but their motives and accuracy have to be inferred from the larger story: Ish-bosheth appears weak and fearful earlier, while these men arrive confident that David will welcome the outcome.
What this passage clearly contributes
Explicitly, the text shows (1) how contested royal legitimacy still is after Saul, (2) how violence is presented as “proof” of loyalty, and (3) how “Yahweh has avenged” can be asserted by human actors to interpret events as divine payback—especially against “Saul and his offspring.” The verse sets up a key question the narrative will answer next: whether David will accept this framing and reward the act (see 2 Samuel 4:8 in its immediate continuation).