Hi Trizzie, glad you found your Grt Grandparents on that site. My Grandfather's name is there but it is not actually him, as he was not Jewish. I cannot say why yours is there if they were not Jewish, as you have described them, being married in a Catholic Church.
What trade did your Grt Grandfather take up with then, after he was no longer a butcher?
Mr Grandfather remained a butcher all his life. He was in Bradford from 1879 to 1889 when he and his new wife moved to Congleton, Cheshire.
I wish there was a website like that one showing all the German immigrants at that time in those areas, regardless of what religion they were. Anyway, if you sign up on that site would there be more links to research under the family name? I wonder...