Odd That Synagogue Shooter only shot OLD People - Average Age 74

Sauce of 11 names with ages: https://pittsburgh.cbslocal.com/2018/10/28/pittsburgh-synagogue-shooting-victims/

Why Not shoot the Rabbi? Why Not shoot the Parents of the Baby?

Why does it take 20 minutes to shoot 11 Unarmed people in a room?

Why would Shooter wait for Police to arrive for a shootout?