The FBI is corrupt and increasingly incompetent. Better to take matters into your own hands in situations like this.

Here's a question: why did the FBI kill the gunman when there were no more hostages? Why not just cut off electricity and water and wait him out? There are unanswered questions about what went down here.

Hostages at Colleyville Synagogue Were Rescued by Themselves, Not the FBI
“I told them to go, I threw a chair at the gunman and I headed for the door”