This shyt is deeper than most of you think.
Managers and CEO's have figured out (with the help of behavioral psychologists) that having workers who are emotionally vested in the workplace creates better results for the company. So all this stuff about "team building" and "bonding with your co-workers" is all just a ploy to get you to feel like you're not "just" an employee, you're part of something greater: a family. The only problem is that a workplace is NOT a family.
However, most people buy into that crap so they end up not only befriending their co-workers, they become very loyal to their workplace, to their "team", and many even organize their lives around their workplace. They might date and eventually marry a co-worker, they might move to live closer to work, their closest circle of friends becomes their co-workers - especially if they've been working in the same place for years, maybe even decades, etc..
But it is all just an illusion. The loyalty that these employees show to their workplace and "team" is never reciprocated. The primary objective of a company is maximizing profit - that's it! If the company feels that firing you would improve profit, they will fire you. For many people, this realization comes far too late and this is why being fired from a job can be a very traumatic experience for some people. Many even commit suicide. They feel that they've invested so much of themselves in the company and they thus end up feeling betrayed.
Modern society has obfuscated the line between private life and work so much so that many people define themselves by the type of work that they do (the first thing that people will tell you after their name is the type of work that they do). This has led to an increase in productivity but on the flip side, it has left many people vulnerable in the event of termination of employment.
Brehs who have a clear separation between work and privacy see this reality for what it is and are looking for their best interests. Even some of the Cacs aren't fooled by the BS which is why many of them are opportunistic and will stab their "team" in the back if necessary. They will put up a front tho and pretend to be friends with everyone.
Tl;dr:
Look out for your best interests brehs. Understand that the nature of a company is to maximize profit and that you're just a small piece of the puzzle who can be discarded at any moment. Avoid becoming emotionally attached to your workplace, co-workers etc. Be friendly tho.
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