Islam could have been dealt with without the Inquisition.
Neither Jesus nor His disciples ever advocated for the kind of treatment for those who disagree with them as the Catholic church has demonstrated throughout the ages.
The proof is in the pudding. Spain was entirely correct to expel the islamofascist colonizers and, unlike Egypt and the rest of North Africa, held onto its Christian heritage. Europe as a whole should repeat the process and probably will. When it happens will you let me drink your tears of ultimate sadness?
Quisling.
The Inquisition did not target Muslims or Jews.
The Inquisition targeted Catholic heretics, include alleged converts (hence, officially Catholic) who didn't actually believe in or practice the faith.
Muslims and Jews who didn't claim to be Catholic were left alone by the Inquisition.
Muslims and Jews were expelled by Ferdinand and Isabella, but that was done by the secular government, not by the church.
No, it could not have - not while Islam retained political ascendency just across the pillars of Hercules in Morocco and were a clear and present danger.
Furthermore, the spanish inquisition was not “against those who disagreed with them” but against those who said they were Catholics but were crypto-Muslims.