[gruez]

>is that the other side will do it anyway and you end up dead.

Preemptive first strike logic[1] aside. This logic doesn't work because political violence never gets out of hand so fast that an entire political movement can be wiped out. On the other hand by starting/advocating for political violence you're almost certainly going to get the descent into sectarian violence before you can wipe out all the "fascists".

[1] Iran, anyone?

[girvo]

> This logic doesn't work because political violence never gets out of hand so fast that an entire political movement can be wiped out

Tell that to the German left during the rise of Nazism.

[gruez]

That just leads to the second problem. Do you think a few car bombs would have stopped Nazis in their tracks? Or it would just create even more antipathy towards Jews?

[girvo]

The Nazis succeeded in wiping out their opposition through violence. Why is that you think that Nazis were able to, but the German left (in this hypothetical) would not have been able to do so in kind?