You're talking about a very complex phenomenon. I don't think predicting what will happen is an easy thing in this situation. Also, Alex Jones is a special case, because he was overwhelmingly and universally de-platformed. This stuff might work differently when the de-platforming is also ideologically bifurcated (i.e. they are not universally de-platformed).

Also, you have to ask yourself:

While pushing a community underground might decrease their reach significantly, does it radicalize them, and increase the overall potential violence for society?