>>The employee was a bit confused by the question (c'mon, how many people serve pizza at weddings???), but replied along the lines of, "anyone can come in here and we'll serve them, but I doubt we would cater a gay wedding". (Or words very similar to that).

>>The reaction was VICIOUS - they received death threats and they received a large number of fake phone orders that disrupted their business to the point where they had to close their shop for a period of time.

This is a fairly common theme, with damaging behavior used as a cudgel by inclusive gentlefolk to enforce their views. I like your question of whether the pizza joint catered *any* weddings let alone gay weddings. If they don't cater weddings- then there's nothing wrong with not catering gay weddings. Or, iIf they do cater weddings, then in fairness they need to be pragmatic and treat all orders as just orders for food rather than potential political tar-babies.

Meanwhile religious and conservatives keep turning the other cheek- though there's some push-back starting now. Quoting Mark Steyn in response to the Associated Press statement that Kellogg's shrouding of Breitbart is because "Breitbart has been condemned for featuring racist, sexist and anti-Semitic content:"

AP doesn’t actually produce any evidence of “racist, sexist and anti-Semitic content”, which would require considerable journalistic effort on its part. Instead, it states blandly that the site has been “condemned” as such. “Condemned” used to be a term with legal meaning: A judge tells a convicted man that he is “condemned to hang”. But in this case Breitbart hasn’t been convicted of anything, merely labeled by its political opponents. Just like Reuters could “condemn” Associated Press for “featuring pedophile content“. If labeling is all it now takes.

And in fact the real target here is not Breitbart so much as the incoming President of the United States, who has appointed Breitbart honcho Steve Bannon as a senior counselor. The losing side in the election wants to “de-normalize” Trump and his administration, by in effect de-legitimizing his voters and their electoral victory.

The left is determined to pressure all corporations to join them in the culture war, and most corporate personnel -- being largely socially liberal anway, and viewing compliance with the left's demands to be the path of least resistance-- tend to sign up to be part of the Left's Social Justice Army.

This is an amoral business decision. And frankly it makes sense as an amoral business decision -- because one side is making demands, taking hostages, and organizing boycotts, and the other side says things like "Leave the poor corporations alone" and "It's a business decision you have no right to interfere with.."

As I said: It's a rational business decision. Because when you look at the incentives, a company's incentives plainly lay on the side of going along with the left, because the right doesn't play this game out of misplaced "principle."
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I hate boycotts, too. I want to be free to reject Kellogg’s cereals because they suck rather than because buying them is a political act. But John Hinderaker’s right: This is a one-way street that leads to a de facto one-party state, or at any rate a one-party culture. The left wants a world in which a discount furniture warehouse is free to advertise with Rachel Maddow but not Rush Limbaugh. And in pushing further and further down that path they make everything political, and render normal civic life all but impossible – to the point where the CEO of something as universal and unobjectionable as Kellogg’s Corn Flakes finds it easier to side with the losing side in a free election, and against half of his fellow citizens. So, if Kellogg’s wants to shrink the market for Frosted Flakes by 50 per cent, fine: let’s frost ’em out, until they understand that, in politicizing everything, they’re the flakes.
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November 8th happened in part because Trump and his supporters decided to hell with that one-way street - to a world in which Richard Gott's decades of service to the KGB pose no obstacle to his membership of polite society but Breitbart can never be allowed within earshot of a single snap, crackle or pop.

America is a split nation politically. If the likes of Kellogg's and Anheuser-Busch want to extend that split to beer and corn flakes, there won't be a lot left. The damage is not just to their brands but to the kind of civil society that produces companies like theirs. If the left really cannot handle losing an election, why don't they just cut to the chase and demand full-out civil war?