I never read a single post blaming the user for his phone getting locked up.
What was said: Beta software & beta software updates are at your own risk
Very few phones are ever permanently bricked except in cases of sudden hardware failure.
Some unexperienced jailbreak community newbie shouldn't be hurling insults at Saurik as the newbie has no idea his JB phone is generally the result of many donated hours of work by Saurik for the benefit of the JB community.
We all generally trust these updates when we hit the upgrade button in Cydia. Yes a few cause issues, but most do not. So I do trust the developers, just as the majority of us do, but if it locks up the phone, you can quickly see who the immature, inexperienced posters are as the profanity and the insults begin to fly. That is why he was criticized and rightly so.