This was a schoolboy taunt directed at people who made extreme but vague aggressive statements of intent with no plan and nothing to back them up. The implication was that such threats were empty...
I feel much the same about the pseudonymous chickenhawk culture warriors who are always encouraging other people to start "fighting" the mainstream culture of materialist atheist leftism.
Because the essence of the situation is precisely that there is no army on our side, nobody to fight With. And so no point in encouraging others to Join-In, because we are each on our own - or, if lucky, having a handful of family or close friends.
That is the fact of the current situation, it's where we start from.
This makes matters simple. We simply need to decide what we personally should do.
And Then Do It.