Your mother is from another country; you of all people should be sympathetic to immigrants is clearly a fallacy.
It takes one single characteristic of a person and uses to attribute that characteristic to other people who share another characteristic with that person.
As in, if you like your mother and she is an immigrant, then you should like immigrants.
But it doesn't go deep enough to analyze the difference between your mother's immigration process, personality and other important aspects that might make you like your mother and dislike other immigrants.
This fallacy is known as Non Sequitur
Non sequitur happens when:
Claim A is made.
Evidence is presented for claim A.
Therefore, claim C is true.
