Who decides what is the right thing? Your in-laws are adults. they get to do what they want, and as adults, suffer the results, good, bad, or indifferent.
Trust is something that takes a mind that is open or a heart, best with both. Lacking either, there is no trust.
Methinks you sell America and its people short. We have had rough times before, we will again. We have a tendency to bounce back, not as it was, but as it needs to be for the majority. Give us time, we are still in the early stages, the best is yet to come.