Inciting soldiers in bloodlust, does not guarantee a win in battle. 

Because it does not matter whether a soldier is in bloodlust or not, as long as the soldier can follow orders.

Bloodlust does not determine the tide of battle as brilliant strategies by generals will.  

When a general is planning a strategy, does it behoove that general to engage in bloodlust?  

What happens to chess masters when overwhelmed by ruthlessness and emotions, especially the negative ones?  

When blinded by bloodlust or hatred or greed, it becomes difficult to see one step ahead, let alone twelve steps ahead required for strategic planning.

The problem with ruthlessness and leaving trails of innocent children and women dead in collateral damage, win or lose, the battle comes at the cost of causing the most crimes against humanity possible without any determinants of victory; senseless.

When the Nazis committed the worst crimes against humanity by killing millions of innocents*; their bloodlust demonstrated in atrocities in hatred, abuses and brute force still did not translate to victory in war.  

Probably because hatred, abuses, abuses of power, crimes against humanity committed with negative emotions, does not involve intelligence or wisdom of any kind.  

In other words, you can be a bully and beat up your victim(s), but it will not give you a higher IQ, you will not be smarter, make you a chess master, give you better understanding of problems, help you create innovations for the future or design winning strategies to win wars, because aggression and abuse of power is not intelligence or wisdom; therefore, is not helpful in any way.

"Wisdom is a shelter as money is a shelter, but the advantage of knowledge is this: Wisdom preserves those who have it."

                                  -Ecclesiastes 7:12

*Civilian deaths from casualties and crimes against humanity totalled 30 million and an additional of at least 20 million more deaths from famine and disease. 

https://en.m.wikipedia.org/wiki/World_War_II_casualties#:~:text=An%20estimated%20total%20of%2070,war%2Drelated%20disease%20and%20famine.