um, you forgot that these type of people also have a hand written list with them of all the things that are wrong with the church - ready to be pulled out at any given moment.
I had one lady who was upset that the church was hosting a racial awareness training. I point-blank asked her why. And she said - "Well, you know..." No I don't, please enlighten me. I don't read minds. I'm terrible at it, was my response. No answer.
I found the best way to deal with these type of people is to ask questions for clarification and keep asking questions to get to the point that they have to either name what the real issue is (Which they often don't do because they know that having the actual words come out of their mouth would show how ridiculous for terrible they are acting) or leads to silence and them walking away.