In order to understand God’s ‘violence’ we must understand his heart behind every act he does.It is good that God manifests his judgments, not because he takes pleasure in them, for Lamentations 3:33 says that he does not afflict willingly, but because everyone will learn righteousness when he does. God’s heart is one of love, and love is always after the good of others. The greatest good for the wicked is that they learn righteousness, and the greatest good for the weak is that the wicked are disabled from being able to hurt any further. Psalm 10 explains this in great depth,
Break the arm of the wicked and evil person;
call his wickedness into account
until nothing remains of it. (v.15)
…do justice to the fatherless and the oppressed,
so that man who is of the earth may strike terror no more. (v. 18)
This explains God’s use of violence, he breaks the arm of the wicked to protect the oppressed, while at the same time he calls their wickedness into account until none is left making them no longer wicked but righteous. We wonder why God must go to such measures but Isaiah 26:10 explains that as well,
when grace is shown to the wicked,
they do not learn righteousness;
even in a land of uprightness they go on doing evil
and do not regard the majesty of the LORD.
And so we see that grace alone is not enough, it takes justice in some cases. However we know that love alone is always enough, because as George Macdonald believed (as do I) justice and mercy are one and the same. Love drives everything that God does, he is not out to hurt people, he may be out to break them, but that will only result in the broken person’s ultimate good.
Scripture says that by suffering Christ was made perfect, apparently perfection is not something attainable by simple pleasure, but by hurt. However a day will come when pain and death will no longer be needed, God will cast all evil out and “he will wipe every tear from (our) eyes. There will be no more death or mourning or crying or pain, for the old order of things (will have) passed away.” We look to this future, when every evil suffered and every pain experienced will be redeemed, we will see that everything God did that seemed violent or needless had a purpose and was done in love.
Remember all things done in love are after the good of others, because love is not self-seeking.