Zionism is a political ideology which upholds the decision by western countries to drop an abusive apartheid ethnostate on top of a pre-existing civilization in historic Palestine and then defend it by any amount of violence and tyranny necessary.
The majority of the people you see defending this evil are non-Jewish westerners with no connection to the Jewish faith, so to equate Zionism solely with Judaism (and vice-versa) is just a casus belli to crack down on righteous dissent and, more broadly, free speech.
For instance, in Australia you can be arrested and sentenced to months in prison by simply uttering "Zionism is terrorism" : archive.is
You can be sentenced to prison in an otherwise progressive and democratic state for simply pointing to the overwhelming evidence that zionists have been terrorizing the native Palestinian peoples for almost 100 years.
Positively, er, Trumpian. Coming soon to the red white and blue near you.
The fugitive slave was considered a criminal back during the first 60 years of this oh-so great nation's history: 1790s-1850s. Not only was the fugitive slave a criminal, but the people of conscience who harbored him in their churches and homes and schools- what we now commonly know as the underground railroad.
That manifestation of humanity and empathy was criminalized for many, many years during the era of the founding fathers and their immediate descendants and it took a violent civil war where many racist white men had to die in agonizing pain in order to undo that terrible nation-wide shame.