It's more likely that the father raised a little terrorist, then tried to save his own skin by turning him in.
See my above. He’s just doing CYA today.
You did read the part where the father recanted, where he only said what he said out of anger because his son stabbed his brother in the leg.
The father didn’t have good intentions here, he didn’t warn anyone about his son, he was trying to use the police to stop a family battle - the same police he accused of Islamophobia, the police department he sued on those grounds.
The father didn’t “do the right thing” here, he abused the system like all entitlement minded, persecution complex wielding, perpetually offended idiots do.