First, let's look at ourselves. There is a problem. Is it because the in-laws have done something wrong that they have conflicts with others? So what is the reason for this contradiction? You should know the cause and effect of the matter. The quarrel between the old people is basically a trivial matter and will not cause great consequences. You should follow the principle of minimizing consequences. If things don't have much impact on life, then don't cling to the problem, let your parents-in-law know that we are all generous people, and don't hurt harmony because of this little thing.
Then look at each other, is it because the neighbor is a hot temper, and whoever is caught quarreling with whom. If he provoked it on purpose, don't just say that her mother-in-law is not good, because the fault is not her own, and she should be considerate. In-laws have problems with others just for your own good, so we should unite. The other party itself is not so accommodating. It is better to do one more thing. Try to avoid contact with them and avoid conflict.
In this case, emotion is more than reason. Everyone understands the truth, and it depends on whether you can reasonably resolve it. Don't preach a lot to the elderly, but understand their good intentions. No one wants to make enemies everywhere, but I still hope you can live well. So, it doesn't matter to share a lot. It doesn't matter if your child is a little angry. After all, they are close relatives, all for your own good.