Because there's two sides.

One side thinks we should sit home, wear masks and not do ANYTHING until next spring. No racing, vacations, concerts, friends over and NOTHING that requires you to be closer than 6' to anyone. And most of them are ready and willing to call the cops on their neighbors if they see any "violations".
These folks tend to be retired, independently wealthy or collecting unemployment (or some other government check) and sitting home enjoying the vacation. They could take the whole summer off, bills are paid so no problem. Probably aren't worried about going anywhere or doing anything else. They call this an "inconvenience" for the good of everyone. Probably think their mask is a fashion accessory by now.

Then there's the folks who work for themselves, own businesses, have investments - maybe they're a small business, a contractor, run a little Mom & Pop restaurant - or for some reason don't qualify for any relief or bailout money. If they are open under the radar, maybe they rely on other businesses who are shut down or people who are now broke to patronize their business. They're dying too and need to get open if they have a chance of surviving without losing their life's work. Their employees need to get back to work. These people haven't made a dime in 6 weeks plus, the bills are piling up, the cash they had put away is gone, and $#!*s about to get real.
Maybe they're someone who races, plays sports, goes to events or maybe their living involves these activities. Maybe they like to go do things instead of sit home. Maybe they'd like to go to church, go visit friends without having to worry about some busybody calling the cops on them.
For these people, an "inconvenience" is getting in the wrong line at the supermarket. For them this is a threat to their ability to make a living, their livelihood, their future, their ability to maintain their way of life. And they really don't understand why sex offenders and felons get let out of jail because of the virus, but they are forced to stay in their homes because of the virus.

So yeah, it's us and them. People are mad and they are over being nice about it.