

That’s astonishing bullshit. There is already a process for ban political parties with political alignments incompatible with the constitution, which has to be initialized by o e of the two chambers of parliament and decided by the constitutional court. Having a political instrument in addition to that will automatically reduce the hurdle of dismantling political movements, for blurry definitions of “sufficient amount of extremists in a party”.
No. The tolerance paradox generally is interpreted to mean that any tolerant society that tolerates intolerance destroys itself. See Wikipedia first paragraph tolerance paradox. Any serious democratic constitution bases itself on humanism and the idea that human rights cannot be infringed on except to protect the human rights of others. Allowing participants in political discussions who question that is outright fucking stupid. They must be excluded, deconstructed, and fought in the streets if necessary. Using the US as an example for anything democracy related is on the same level as using China as an example for well implemented communism.