How did the case Lamb's Chapel vs. Center Moriches School District affect America?
This case affected America by strengthening the protection of free speech and by, to some extent, making it easier for religious points of view to be expressed.
The most important holding in this case was that a school district could not prevent a certain point of view from being expressed on their property (at an event outside school hours and not sponsored by the school) just because that point of view was religious. This strengthened free speech protections because it made it harder to discriminate against speech based on the content of the speech. This also helped make it easier for religious points of view to be expressed by allowing them equal access to venues like school buildings which are often used by various groups after school hours.