There's a few things happening

Preference falsification from engineers, especially after James Damore had his character publicly assassinated. Yelling "shame shame" at him before chopping off his head was a warning to everyone else to keep quiet or echo the correct opinions.

There's a lot of tribal signaling and "don't hurt me I'm one of you".

Then there's a new generation of engineer who are true believers (as well as some old gen who converted) and for who programming is just a lucrative way to participate in late stage capitalism as a wage slave. They are aggressive bullies and codify their beliefs into CoCs. Their passion is the new religion, not programming.