Already happened. I shit you not but I saw a Liverpool fan on Twitter last night claim that the Parisians who jibbed in were dressed in Liverpool shirts!
As for the other bit that I've bolded, this is bang on and as fair an appraisal as you can get. I, and many other City fans, were on the receiving end of unwarranted police brutality in Madrid a few years back, as has been the case with many other clubs, and I can't deny that there have been loads of similar stories regarding the French police towards English club fans down the years* so yeah, no doubt some innocent law-abiding Liverpool fans were targeted. But it's also clear that ticketless fans and fans with forged tickets also added to the chaos and arguably contributed to genuine ticket-holding Liverpool fans being locked out of the stadium. Do people seriously believe that every ticketless Liverpool fan just stayed in the fan park to watch the game?
*I will add that luckily, my one and only experience with the French police around a football match was actually a very positive one. It was at Lyon in the CL in 2018. City fans were being encouraged to get the dedicated buses to the stadium, but me and a mate decided to get the tram. It was full of Lyon fans and there wasn't any trouble but when we got off at the stadium, we realised that we were at the wrong end of the stadium. Turns out that there were another 3 or 4 blues on the same tram. Lyon had a pretty bad reputation for football violence and the police saw that we were City fans so politely suggested that they should escort us round to the away section. They were seriously mob handed but were as good as gold.