He made a serious mistake.
Liberals are never worth saving. Even if he said it to make his letter more easy to swallow for moderates, all he does with that line of thought is endanger others by giving them the idea that risking you life to save a liberal is acceptable. No sane human should ever risk their life or protect the life of a liberal. EVER
If a liberal is saved by your indirect action, thats another issue but regrettable regardless.
Some liberals might be more open-minded if a conservative saved their life. I know anecdotally that did not work in the case of Eric Bolling saving Bob Beckel from choking to death, but still, let them die? Doesn’t such a thing dehumanize us? That’s what I believe it would do.
For example, let’s say I’m dining at a favorite establishment in a liberal town. Suddenly I hear “ALLAAAAAAAHU AKBARRR!!!” and then POP! POP! POP! Looking around I see a direct line to the terrorist, and his gun is aimed elsewhere. I jump the terrorist, disarm him (by some miracle), shove the gun in his mouth and pull the trigger, sending him to Hell to get his 72 Helen Thomases. Would you and God really frown upon me if some of the lives I saved were liberal lives?