surenos are the biggest,and the only active gang left in the U.S. there are 50,000 surenos in los angeles,alone. the other gangs you listed are defunct,and the membership numbers outdated
50,000....meh. I'd probably cut that number in half, and even still you have a bloated estimate. A lot of Sureno gangs that people list are defunct or down to a handful of members, too.
And, I'll assume there's a typo somewhere in your argument that Surenos are the only gang left in the states.