It seems some folks view their firearm as merely a fashion accessory like a hat.
I view mine as a lifesaving tool. I expect the legal presence of my firearm to be accommodated and tolerated to the same degree as my pen knife, multi-tool, an insulin pump, epi-pen, or other medical device.
There is a line between being polite, and actually bowing down to lick the boots of those who oppress us.
As OCers, I expect that nobody here intends to be forced into the closet recently vacated by the various sexual minorities. I believe I have a right to carry discretely. In general, I don't accept an obligation to do so to protect someone else's delicate feelings. If students or teachers in a college classroom (or even grade school) are uncomfortable with my peaceful exercise of my rights, they have a problem to work through, not me. Ditto for some soccer mom with her kids at the park or library, or the stranger walking down the street or sitting at the next table over in the restaurant where I'm dining.
For all the minority sexual and fashion behavior that society is now mandated to tolerate and accept, I'm not about to happily accept discrimination, bigotry, and intolerance toward law-abiding, peaceful, polite gun owners who choose to carry a properly holstered handgun for self-defense.
I obey the laws as I work to eliminate laws that infringe my RKBA.
Given notice, I'll give the highest deference to a man's castle and his holy ground. If you want me to remove my hat, or don a yarmulke, remove my shoes, lower my voice, shout in praise, or not bring a firearm inside, I'll respect your wishes...one way or another. But I expect the resident or church to take the initiative to give reasonable notice. I just don't see any reason why I should have to probe and ask about whether a perfectly normal, lawful, lifesaving item is permissible or not....except for some poorly crafted laws in certain jurisdictions that need to be repealed.
As for businesses, I'm not going to happily accept being required to sit at the back of the bus, or being refused service simply because I choose to be lawfully armed. I don't expect my homosexual colleagues to have to call ahead and check to see whether they and their partners will be welcome to hold hands or otherwise behave as a couple like any heterosexual couple would, while in the establishment. I don't see any reason why I should expect any less accommodation and tolerance for my holstered handgun, whether OCd, CCd, or CCCd that particular day.
Laws that mandate me to get prior permission, or that allow business owners to discriminate against me are every bit as offensive as would be laws allowing business owners to discriminate against a same-sex couple holding hands ("You can be homosexual, you just can't act on it in this business").