I would consider anyone who is a Stormfronter to by definition not be a Christian.
That is, of course, by my definition, but I have plenty of scriptural arguments to back up that definition. Stormfront is based on racism and racialism. The Bible contains zero of either. The Bible writers just didn’t care about such things.
Not to mention that Stormfront probably has only a few hundred real users. There are probably more government spooks and leftist snitches there than there are true Stormfront believers.