This is an interesting confllict..
On the one hand:
"Would stormfront types like to bend the largest forum on the internet to their collective will?"
Answer: Absolutely, you bet your ass. They would use it as a vehicle. Do it in a second.
On the other hand:
"How easy would it be to subvert an already tainted movement like border security with online tactics and red herrings?"
Answer: Pretty easy. You just go to a place like stormfront and post a bunch of racist crap.. then claim to be allied with the people you oppose.
We Report, you decide.
Problem for your theory is, the stormfronters really are in it up to their eyeballs. Blocking immigration is one of their primary issues.
You beat me to it, but THANK YOU.