Not in the US that I’m aware of. Nazi t-shirts are banned in Australia, and probably several other countries. I wouldnt say I’m afraid of it but I’m not making it up either.
Both ISIS and Nazis are terror groups whose explicit goal it is to kill large numbers of people
You’ll get no argument from me. But wearing a T-shirt or shouting a slogan is a far cry from killing someone. The freedom of speech in the US includes the freedom to hold and express shitty or simply unpopular opinions. It’s a necessary evil in order to prevent things like banning legitimate criticism of Israel.