How am I supposed to beat Saladin campaign 5?

Noob player here.

So, i was having a lot of fun playing the Beginning of the saladin campaign, it was not that hard and actually fun to play.

But then i got to the Jihad mission, where i need to destroy 2 of 3 enemies.

And it just feels impossible, cause I start with barely nothing, and they just raid me with massive armies, and when i try to defend myself to get some resources, they go and build a Wonder.

And I can’t destroy it cause the army protecting it is just so overpowered against mine that even if i build a camels army (which is counter to knights i guess) they just obliterate everything I throw at them.

It was a fun challenge but now is only getting annoying.

Anyone can help me win this? Please.