Statutory Warning: I am not endorsing/against any emotion in particular :)We are surrounded by emotions everyday, thanks to media/social media, viral nature of it
just amplifies the matter to the worst.
How we get emotional:
Triggers can be linked to Language/Race/community/Patriotism any thing which involves more than 2 people. As an example attack on a person belonging to a Race can incite violence to spread ( we have seen in India as well as in Developed nation Like USA)
why we get emotional:
We relate ourself(individually) to the affected person/group and a fear psychosis prevails and aggravate. Other people projects the ill behaviors and how a person/group is suppressed to gain sympathy and incite more triggers, garner support
what is the benefit to others?
If you would ask me few years back it was for political movement to get support organizations/companies to leverage their products-services. Nowadays almost everyone(Media to a larger extent) want to get their 15mins or 15 days of fame. Though this appears shallow, ulterior motive is to divert the attention from a bigger topic (to use recent example, from Demonitization or a political issue)
what we(individuals) lose in the process?
Cognitive ability to think and take decisions, rather we succumb to a forwarded whatsapp or tweet/post and believe it is true, sort of bias we develop. Emotions blinds us to discern between truth and lies. In this process we see a choice between devil and deep blue see and nothing inbetween. We choose a wrong product, wrong leader, wrong idea.
To take examples, be it an attack on race, language related disputes, water sharing, sports, political dramas, economic scandals all will die down after weeks if not months from the mainstream media and we move on, thanks to our short-term memory.
It is OK to be emotional but let it not blind us, drown us from seeing the truth