The benefits are infinite. The Agnihotra benedictions are not only on a material level but envelope all the three levels that all creation exists and you are a part of that Total existence. I may speak for hours on end yet what good is it?
The best thing is to experience it yourself. My personal experience is phenomenal. At least I may say I know what joy is, all my needs are fulfilled as also my desires.
When speaking of joy happiness is a very crude word. If this may not be your wish or goal then perhaps Agnihotra may not be for you. There are thousands of Muslims, Christians, Jews that I have taught and are practicing Agnihotra for the last several years.
This is a perfect science and can be empirically proven. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.