You need to not only quote the first line of the topic, but the whole topic including the NBC News video and the experiment.
Otherwise, this can be taken out of context which is how you are using it.
In the experiment, three devices were connected to the internet and all three were hacked. The first line of the topic is a logical conclusion based on the experiment conducted.
Also, the infrastructure is the hardware, software, cabling, etc. that make up the internet. It’s not limited to, according to you, “an attack on some infrastructure, presumably the one that aids the people running the Olympic games.” This is not something that may or may not happen, it does happen and will continue to happen.