There are plenty of critics living in those countries who think it's a bad idea to limit free speech beyond limiting imminent incitement of violence. Nadine Strossen discusses this in, I believe, her appearance on the Higher Ed Now podcast [0], including this excerpt,
14:20: "Countries like Germany which were in the vanguard of enacting and enforcing laws against hate speech were in the rear guard when it came to outlawing actual discrimination against people in the workplace, in places of public accommodation in housing. It wasn't until very shockingly recently that Germany was dragged kicking and screaming by the EU to adopt those laws… targeting expression is only a superficial manifestation of a deep-seated problem, and it also is divorced from the actual real world consequences of discriminatory and violent conduct."
> One opinion I've heard in Germany is that the free speech absolutism and value neutrality of the constitution of the Weimar Republic allowed NSDAP to take power in the first place.
The Weimar Republic had hate speech laws. Nadine makes the case [1] that photos of Hitler imprisoned for running afoul of those laws helped him rise to power.
It's not so unlike Milo receiving attention for being prevented from speaking at campus. The protesters do not realize their dogmatism and censorious behavior bring Milo more followers. Protesters should consider how their behavior will be perceived [2] by someone who knows nothing other than the fact that one person wants to speak, there is a willing audience, and that protesters either: stopped that conversation from happening by being noisy, or responded with counter speech and letting haters bury themselves [3]. If you are shouting over someone, you become a hater. It doesn't need to be that way.
[0] https://podcasts.apple.com/us/podcast/nadine-strossen-free-s...
[1] https://youtu.be/J1iZffRFs8s?t=2838