Philosophy, religion, Zamorakism is a ideal a way of life (even if it means setting people there houses on fire).
But, so is every other way of life and religion and what's so ever.
While extreme in most cases; you can't argue it doesn't work 100%. The weak grow strong, the strong stronger or all die trying for what they believe in, there is always a certain honour in what someone believes in.
Now, Zamorak will cause most of these "obstacles" to "help" "improve" mortals, willing or unwilling. Good, Evil, it barely matters, actions have there purposes for ill or good will and they will always come with consequences and there down sides they bring. After the fall comes the rise, from the ashes mortals can and will arise from it.
As for zamorak being a hypocrit and all, i agree, Zamorak will do things that are against his own stances and beliefs, but then again, wouldn't we all be, not even not a little?
If we put our self into the shoes of the gods
Forces Zamorak to bent and demand your loyalty? Can't say for sure. But if you give your life and services to someone, be dang prepared to bite the dust if it doesn't go as you want.
I do know Zamorak is paranoid: afraid, prepared, willing to keep his people in check so they don't betray him. Betraying your master/lord will inspire others to do the same thing, no matter for what reason you do it.
"If you believe you can distance yourself from the harm you cause, you're deluding yourself. You're not some mindless tool. You're accountable. Your actions will catch up with you eventually." -Jedi Master Jun Seros; Swtor Bounty Hunter storyline.