Did he yell Allahu-Akbar, you infidels must die? Then he might not be a terrorist.
It would be politically incorrect (therefore a crime today) if you suggest a religion which tells its followers to murder infidels produces followers who murder infidels. But it’s not politically incorrect (therefore not a crime today) to suggest that a religion that tells its followers to love thy enemy are worse than Nazis. Just because they oppose abortion and homosexual “marriage”. (Opposing them is a crime today.)