Wow. An umbrella fundamentalist. Is there a law of the internet that for every trivial thing you can find someone with absurdly strong opinions leaving comments about it?
There has to be, it's one of the few constants of the internet.
That said: you merely have to experience umbrellas in a high-density environment a couple times before those opinions are the only rational response. Umbrellas are hostile to everyone within reach. (corollary: whenever that number remains at zero, they're perfectly fine)
It's definitely the people.
Walk around Brooklyn on a rainy day. You'll be on my side before you know it.