So if the Klan burns a cross in front of an African American family's house but no property was damaged, that's not a hate crime?
I think that people have the right to feel safe. I mean, yes, there will always be accidents and criminals, etc. but people have a right to live without fear for their safety based on race, ethnicity, gender, sexual orientation, religion, age, physical and mental ability... And I interpret this act as one of extreme intimidation.
Free speech cuts both ways. If I say something that you don't like and you retaliate by threats and intimidation, then is my speech really free?
Even more to the point, if I say or do something that you find hurtful, and instead of confronting me about it, you take it out on someone who looks like me or is the same religion as me, is that not evidence of bigotry? (rhetorical "you", not you personally)