Reposting my comments from the other thread on this topic:
Why would Americans tell him (Adolphus Busch) he was not wanted here? Certainly not on the basis of where he came from. People of German descent, myself included, were then and are still today the largest demographic group of Americans on the basis of ancestral national origin. After the revolution the idea of making German the national language was a real possibility. This seems very political no matter what the company says.
Not to mention, Adolphus Busch came here legally, and obviously had a marketable skill that could contribute to the country.