What does 1 Samuel 17:26 mean?

David asked the men standing near him, 'What will be done for the person who kills this Philistine and takes away this disgrace from Israel? Who does this uncircumcised Philistine think he is, mocking the armies of the living God?' 1 Samuel 17:26 - Modern Text Bible

(David is shocked that no one has stood up to Goliath and sees the situation as an insult to God, not just a military problem.)