This gets into some speculation, because the Bible isn't telling us the whole story about everything that was going on and all the side conversations. We are only given this example of putting earthly things before God, and the fact that they are using these things as an excuse to avoid doing what Jesus has called them to do.
It really has nothing to do with dishonoring your parents. It has to do with honoring God above all.
Remember, that people also use fault finding as a way of trying to excuse away the truth.
We hope this helps.
In the Love of the Lord,
Frank and Mary