I agree with you, but it's not even for-profit spaces that are an issue.
The ability to interact with so many people--in near total anonymity, and who you are virtually certain to never meet again--significantly lowers the barrier for acting uncivilly. And likewise the facelessness of other people means that it's so much easier to mistakenly interpret their actions as hostile.
Think of that jerk who totally cut you off yesterday, versus you who just needed to squeeze in between two cars to make your exit. Or how much less likely you'd be to react negatively to your neighbor driving slow in the left lane versus a total stranger.
Our ape brains and thousands of years of human evolution give us the instinct to treat strangers outside our "tribe" with suspicion and interpret their neutral actions as hostile.
Sure those instincts can be exploited for profit and exacerbate them, but I disagree it's the root cause or the reason hostility seems to be on the rise.
The biggest problem is the trio of religions that originated in that area and their spin-offs. All are based on the old testament, so all can find something to use to exterminate the non-believers.
As long as there can be found an excuse to force ways of life (religion or otherwise) onto others instead of letting others live their life as they see fit, we'll keep this mess.
The main problem is the core of Jewism, Christianity, Islam,... that most religions think only their religion is the correct one.
Give them support. As someone who is socially challenged, there have been times where I think to myself "if my personality was bitter, who would act as if they cared". I know it's cliche to quote him, but it often feels like Nick from Zootopia spoke to a recurring element in our lives when he asked what the point is in being society's best when you're only going to be treated one way. Not that I'd act bitter, that's too far from my natural skillset, but for some people it comes naturally.
Make all jobs have to pay enough to have food, housing, healthcare, and other necessities of living so people don't have to cheat and steal to get by. Give those things to everyone and make work only for paying for luxuries.
Until I walk out of my apartment one day or another and someone just socks me in the face on a consistent basis, I don't really find the world incredibly hostile. That's just people buying what the media is selling.
Everything's gone up but our wages. Too many people are living paycheck to paycheck. Most of us work too damn hard for too damn long, get paid too damn little, and pay too damn much in taxes on what damn little we get paid. And in the meantime you've got a bunch of arrogant cunts starting wars and playing power games for no sensible reason.