Well some of your Jewish sages believed Psalms 2 referred to David's greater son, the messiah, so I guess it's a matter of interpretation.
Again, even if we say that it does, it still doesn't mean what you're trying to make it mean. The messiah isn't literally God's son any more than the Jewish people or king Solomon is.
Here's a point to consider: the text describes the nations conspiring against God and His Annointed in a futile attempt to throw off their subservience to them.
Or, it could be about the trials that king David experienced in his lifetime, as many Psalms indeed are. Did the Philistines try to depose him? Yes. Yes they did.
I choose to believe that individual is Jesus of Nazareth. Time will tell.
As is your right.
