The guy who says "more better" wants to call people dumb. Whatever.
1. 3,400lbs vs 3,800lbs is not about the same weight. The Malibu is not aluminum, but the point was not about materials but about mass and inertia.
2. Newton's 1st law would be applicable to both the bug and the windshield and has nothing to do with why the bug disintegrates and the windshield doesn't. It has to do with force and the differential. More mass onlybe comes beneficial if you have enough force to exceed that opposing force. Of course a bug has less mass than a moving vehicle.
It's ok if you don't understand physics, but if not, don't pretend you do.
Poor guy trying his best to be right on the internet. It's ok not everybody had a good physics teacher in high school. It's ok to be wrong sometimes.
Just remember kids, when two objects collide, more weight =