Any time we make a gift there is the risk that it is unappreciated. Or that we didn't pick the "right" colors or whatever...
I say make them a quilt if you want to, not expecting much in return But you don't know, this might be the thing that turns your non-friendly neighbor into being someone who could appreciate some extra village support from next door. Or not... we just don't know. We can only do us while they do them.
Be aware though that modern baby advice says no blankets in cribs for the first (now couple!) of years, just the blanket sleepers. I say we still need cuddles and covers and other things.