When it comes to the Bradys, everyone except Caroline, gets that Bo left his family of his own free will and then called several times to cancel on seeing them before completely going silent. Every Brady but Caroline gets that Hope not only was abandoned, but that she spent a lot of time on her own hurting before she began to move on.
Caroline's reactions and actions to Hope moving on are appalling. Sure Bo, is her son and she loves him no matter what, but she does know Bo did what he did and is lashing out at Hope because she won't accept that. And that not only hurts Hope, but it also hurts her grandchildren.
If Caroline was just pulling aside Victor, Kayla and Roman and telling them, without trying to disrupt the wedding, that would be just fine. But her interference has been just rotten. Hope tried to deal with it without being rude, but Caroline wouldn't stop. Caroline deserved it when Hope yelled at her and Hope is nothing less than a saint to still have kept the invitation to the wedding open to Caroline.