The reality is in demographics. Muslims are outbreeding Christians by 6:1. Until all those good Christian families start pumping out kids in the 5s and 6s, there's no changing that fact.
The only other solution is to firmly entrench secular government. A tradition of a secular state means that no matter what religion is ascendant (or non at all), government is by rule of Constitutional law.
And if you think that Islam is the only religion with conversion by the sword, you need to read history.
