Parler ” allowing anti-Semitism”
I understand that they are simply not censoring the posts. Obviously, they’ll get all kind of dirt.
This is not different from “internet” or “books”. The medium allows texts and images. It is up to the user, or next level application, to select what he wants to use it for.
If you would not have email filters, half of your email box will be filled with pornography and viruses.
You need then a kosher filter over Parler, same way you (your internet provider) has a spam filter.