Sigh... It's a very common thing with xenophobic people to be angered over mixing of "blood". Scientifically, it's the best for DNA to mix bloodlines from elsewhere.
@Mik_Olinayag
A quick, real world example: isolated villages/clans typically seen on singular islands. Mostly acceptable because they would be highly susceptible to diseases brought in from outside sources.
A quick, fictional example: Among Us.
@fridgebro Uhhuh, what? They aren't living in North Korea or ISIS land. Even if it did become a public matter, the geezer would go to a prison and pay fines. However, Ritz definitely won't make it a public matter, so no prosecutor (or equivalent) will ever hear about it. Ritz didn't even do anything to the drunken, useless soldier who punched him! Why would he cause trouble for an old man who thinks he's saving his only grandchild?