Different kind of hate, maybe?against Hispanics because the Spanish Language service was about to start. I had the same question. My wife was there and had left about 45 Mins before this happened.
See the world's most ironic headline:
'Free Palestine' written on gun in shooting at Lakewood Church, but motive a mystery: Sources
A pro-Palestinian message was written on the gun belonging to a woman who opened fire at celebrity pastor Joel Osteen's Lakewood Church in Houston.
abcnews.go.com