He did sue because of the Christmas Trees. The Menorah is only a side issue. If the Christmas Trees were not there at all, he would have had no
grounds on which to sue. Therefore, they are the cause.
I agree that he's within his rights to sue to his heart's content. However, the results should not affect the company's right to put up whatever
kind of decorations they want.
Next year, I'm going to sue a place that puts up Halloween decorations on the basis that they didn't include All Saints Day decorations. After all,
Halloween and All Saints Day are much closer to each other than Chanukah and Christmas.


