If you reduce your definition of fascism only to actual, original Italians and Germans in the 1930s and 40s, you completely disregard lessons that we should never forget, to remain always vigilant against the causes of that era. It doesn't somehow show respect for those who fought it then to shout down anyone who thinks comparable things might come to pass in our present time.

I understand you think it seems childish to accuse certain practices today of being fascist, but you must also understand that by the time it's clicking its boots and saluting a dictator in front of columns of tanks, it's a little too late to make the comparison in a useful way. Unfortunately it requires a bit of imagination to work with an uncertain future, as is always the case.