Subtle difference between “I insist he be punished” and “I insist he should be punished”?

1. I insist he be punished.

and

2. I insist he should be punished.

What’s the SUBTLE difference between them?

Answer

You are insisting on two different things.

In the first, you are insisting on an actual result: that someone is punished.

In the second, you are insisting on your opinion that someone should be punished.

Attribution
Source : Link , Question Author : xmllmx , Answer Author : Andrew Leach