In this case, it is YOU who are wrong, and not them.
First of all, it's YOUR mistake in not researching ahead of time and therefore not being fully aware of the laws in all states you will be going to.
Second of all, the law states that you cannot open carry anywhere alcohol is sold for on or off-site consumption. That means anywhere alcohol is sold, period, end of story. You must have a license to carry concealed in places that sell for off-site consumption like that convenience store. You actually committed a fourth degree felony according to these laws.
It's all very clear, right here:
There is no misinformation, only your poor awareness.
You should get over your attitude. You should also never ride without actual eye protection. If you aren't, that's pretty bad. How important is a picture? Is it worth your eyesight?