"Dude, seek mental help. Let me speak slowly: The entire Omar family immigrated AT THE SAME TIME IN 1995."
No, they did not. When trying to flee as refugees, people use whatever story they can to get the hell out. I dated a Vietnamese girl once that used her uncle as her father to immigrate. Because the areas are war torn and the records were near worthless even in peacetime, you faith in her story is naive at the least.
"They ALL had the opportunity to become US citizens!"
It is called spreading the risk. Pretty much every country has a form of chain migration. So, the have the brother apply to UK as a fall back in case US status is rejected. Again, have you never lived in/interacted with an immigrant community? Half the documents are total BS.
"No matter what the date, her real brother did not need her to become a naturalized citizen because he already had that right himself!"
Via chain migration - a process that takes up to 12 years...as opposed to marriage which is done in under 6 months. Again, explain the name, explain the multiple marriages, explain the tax filings. I know as a law abiding person, you think everyone else follows the law as well - you are dead wrong.
"No one named Ahmed Nur Said Elmi, who is three years younger than Omar, could be seen listed in the documents."
Of course not - that is the spreading the risk. He can't file for a refugee in multiple countries. He was the fall back plan.
"The papers say Ilhan was the youngest child and Elmi is 3 years younger than her. Now explain again how Elmi is her blood brother when he didn't come from Somalia?"
Her brother did come from Somalia - to the UK. Again, can you at least get some basic information rather than just taking 2018 info from Snopes as the Gospel truth?