kyoki

My source is Lord Kinross seminal book on Ottoman history. Suleiman "Qanooni" attempted one major invasion of Vienna that was repulsed. The Ottomans spent far more time fighting the Safavid Persians, the Russians, etc than the western Europeans. 

The Ottomans also got assistance from France in later dates, who used them to fight their Habsburg enemies.

As for Holy War, let's not forget they treated Jews and Christians a lot better than Muslims were treated in Spain and Italy. In those two west European countries, every single Muslim and Jew was killed, converted or expelled.