In the year 2000, Ilhan Omar became a US citizen at the age of 17-yrs-old. As a citizen she isn't impelled to "marry" any family member, including an alleged "brother", in order to secure their legal status in the US.
Pro-Israel Zionist / Far-right fraternization may be surprising to some, as their factions' "public image" apparently insists they violently despise each other. However, their fascist dystopian ideology is pretty much one and the same. Domination and oppression by any and all means necessary.