This argument is getting quite boring. It basically comes down to these viewpoints, bare with me.
1. Was it intentional? You’d have to be mental to actually want to create contact at that point. For both your own race and your opponents. Hamilton has never really shown anything in his career to suggest he’s a malicious driver. If you have this viewpoint, I’d understand why you are annoyed, but I don’t even think Horner thinks it was “intentional”.
2. Hamilton made a mistake and was at fault. It’s what the stewards judged predominately. It’s why he got the penalty, however, they judged that he wasn’t solely to blame, hence no stop and go. If you have this viewpoint it’s time to move on. If this happened in the midfield it would barely have been discussed after the race. We also have plenty of other examples of title rivals crashing into each other. It happens. Forfeiting points, being banned from the next race is so extreme, I don’t even remember the last time this happened.
3. Racing incident. We all want to see overtaking, this will lead to high risk, contact and crashes. Also noting that Max has completed lots of overtakes previously where the opponent has little choice but pull out. Right or wrong, that is undeniable. It’s also pointed out that a more experienced driver would have let Hamilton go (with a 35 point lead) and over taken with the faster car later in the race.
What I’m saying is that unless you have viewpoint 1, which most sane fans don’t, it’s time to move on. Even if Lewis was at fault, you can’t criticise him for the 10 second penalty. He could only race how it was presented to him.