Little Froggie – You make the assumption that because the bochur was dressed like a Chossid, he was a Torah Jew. That assumption is incorrect.
1: Chassidish garb is the “in” fashion for many designers. I read an article about it somewhere.
2: The person may have been Orthoprax, and did not consider you to be a Torah Jew that he needs to protect himself.
3: The person may be “off the derech”, and Israel (or America) may have been the final attempt to try and change his Mazal.
Ignore Joe. You had no idea what the circumstances are to even begin to give Tochacha.