It's a boundary violation for sure, but I can also see how it was kindly meant (especially if neighbors did know of the husband's cancer). I think Alicia can thank the neighbor but explain that they are Jewish.
In some neighborhoods, it's not unusual for neighbors to go onto one another's property to shovel/take the trash cans down/do other chores. Alicia's neighbors might think that way, too.
This is very common in our neighborhood. People drag in other peoples garbage and recycling bins all the time.
My spouse shovels the neighbors side door walk to the garage because she is pregnant and her spouse leaves for work too early in the morning to manage it and the front sidewalk. It's just part of the way we look out for each other...no different than my signing for a package for a neighbor and then dropping it off when they get home from work.
So, yes, the neighbor did overstep, but I think taking the attitude that it was well meaning is the best way to insure decent relations with the neighbors.
There are times all of us are going to need some kind of help and the best way to receive that help is to be willing to give it. If someone is the kind of neighbor who gets upset because someone put their bin back from the street, then they shouldn't be surprised when no one bothers to close the wind flipped over lid and their garbage ends up blown around the neighborhood.