Really? Bad in Glendale? I didn't see it North of Bell. We'd actually welcome some Latin culture, it wouldn't be so much of a culture shock. I'm thinking like you implied, it must be further South.
The people are so pleasant here, and some folks here seem surprised when I describe them so. I would not go back. There's an obvious degradation of culture hastened by the influx of the 3rd world, no matter if there are good folks among them or not.
Bell is substantially north of Northern. Northern WAS the dividing line back when we lived there. South of it just had spotty bad areas. We were shocked at how far North that "Latin culture" had spread now. I'm not talking about the occasional 'Pequeño Rancho' decor. It's the graffiti and 10 Chevy junkpile yard sculpture for blocks at a time.
But it's a bit of 'Perfect Storm'. The real estate meltdown has made a bad situation much worse. My hat's off to those folks that have hung in there and tried to keep their neighborhoods up though.