I Think Jealousy Is the Most Lethal of Emotions

Probably the most toxic emotion in a relationship.

I think insecurity is worse. Jealously often comes from a root problem that's much more threatening.

Jealousy is one of those human emotions that is wasted yet can be painful and stressful. Must learn how to channel that feeling

I absolutely agree there. I have see so many families, friendships destroyed no matter i am on earth.

Jealousy or even lack of trust.
Killers.

Real relationships shouldn't contain jealousy.

Yes it can be destructive

Absolutely.