[PGR88]

It would take stupendous courage to sit through those real threats.

As mentioned, I am not criticizing Cruz. Few people are prepared to deal with such outrageous behavior.

Given your point though -if physical harm is possible, then its better to stay in a crowded public place, than go out into the nighttime street. Even more reason to stay and let the Restaurant make it a police issue.

[Blue Jays]

"...real threats..."

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Emerging from a doorway into the outdoors is the greatest level of exposure if we are measuring precise risk.
It would take a remarkable brand of crazed psychotic leftwinger crackpot to shoot-up an entire restaurant to get to one man.
Senator Cruz and Heidi Cruz would have been far safer indoors and awaiting police response.