If one does not recognize the reality that Egypt has been vanquished and is under the control of foreign domination, then there is no real justification for fighting, as we are ordered to be patient with oppressors; and history has proved the wisdom of this order, as rebellions most often lead to greater strife than they were intended to prevent.
But the reality is that Egypt has been conquered. The regime, El-Sisi, the army, etc., are not the rulers, they are collaborators serving the imperial masters who are enslaving and plundering the country. In this case, fighting is not only justified, but obligatory.