It's weird that we live in a world where grifting and scamming is so prominent even at the highest and most visible levels of society, and people still don't seem to understand what grifting and scamming are.
Umar having a building ready now doesn't mean he wasn't and isn't still grifting. Him opening the school doesn't mean he wasn't and isn't still grifting. Donald Trump is the real president of the U.S. and 90% of what he's done in office, especially this second time, has been grifting.
As many people have pointed over the years, if Umar actual goal was to open a school to help black boys, he could have done that several times over with the support he's had for more than a decade. We know this because many people have done exactly what Umar claimed he wants to do with less support. Something doesn't have to be completely fake to be a grift. If he's out there asking for money specificallyp for school, but using 75% of that money to fund his own personal lifestyle, he might actually open up a school one day, that doesn't mean he hasn't been grifting and robbing people.