There's good and bad everywhere and hopefully wiser heads will prevail but I seriously worry that some cyclist is going to be very seriously injured and the finger of blame be pointed at the motorist when the behaviour of many cyclists on the road (and footpaths) is reprehensible.
When a cyclist gets injured by a car, statistics shows that approx 85% of the time, the car driver is at fault.
Therefore its important to recognise that in most cases drivers and cars are the problem, not the random cyclist breaking a red light or a guy on Twitter.
Cyclists were getting killed by idiot drivers long before Twitter.