You're absolutely wrong and show an obvious lack of experience behind the wheel of something with a bit of power.
The faster he is travelling in this circumstance, the less time he spends next to the riders, the less time he spends on the wrong side of the road with other cars heading his way....I can't actually see what is wrong with the overtake in the slightest! Good visibility, good weather conditions, nice long straight, and until the braking due to the camera van, the car was far more composed than your average PoS car travelling at 60.
If he'd done the same overtake in a 1.6 focus, he would've crawled past, meaning he's next to the bikes for an eternity, so when a car coming the other way is going quicker than he realised he'll probably take the safer (for him) choice of diving into the pack of bikes rather than having a head on (well....one possible scenario

)