You can't make dynamite go off without a blasting cap or something similar. Dynamite by itself in luggage will not blow a hole in the side of a plane.

However, I have no symphathy for the guy who packed it in his luggage. He probably spent the previous 19 of his 21 years in front of a TV or computer and has no grip on the real world. His punishment should be to be put in a departure lounge for several hours with all the people he inconvenienced. He would start growing up real fast.