God does not just feed us when times are easy. He feeds us when we are at home and at peace, He feeds us on the road, and He feeds us when we are at war. He sets a Table for us, David says, in the presence of our enemies.
There are two ways this could go. One way would represent a wavering of faith on our part. The presence of our enemies, and their awareness of us, could cause us to lose our appetite. We might come to think it was somehow not appropriate for us to eat -- even though God prepared the food -- when we were in such a circumstance. But to state this plainly shows us what we ought to do. The Lord prepared the Table for a reason, after all.
The other way it can go is this. Our enemies see what God has done for us, and the incongruity of the whole thing is not lost on them either. But their response is rage. We can know this, and refuse to alter our enjoyment of God's kindness to us, and yet remain free from spite.
If any of them set down their weapons of rage, and petition the Lord of the Table for a seat at it, He would provide one -- a seat purchased by His own blood, just as our seats were purchased. No, we are driven by joy, and not by spite. How could we begrudge such a thing, after what it took to get us here?
No, this is the Table that feeds love, and eats hate. The world, and all it contains, will go down before it. So come, and welcome, to Jesus Christ.