Westerners reproduce at below replacement rates, and the USA is the only Western country of any size that is reproducing at a replacement rate.
Europe is being overtaken by Muslims because Europeans are no longer producing enough children to sustain their population.
People who intentionally limit their reproduction are handing their future over to the Muslims, who aren't.
There is no practical difference between ceding the future to Islam and converting to Islam. One is still helping them to gain the ascendancy over the West.
I refer you to Mark Steyn's recent book America Alone in which he describes the demographic situation in detail.
Right now, one in every three children born in France is Muslim, despite Muslims comprising only one in ten of the population. In 15 years that ratio will be one in two.
As I said, it's nutz to make that kind of statement. There is NO comparison between birth control and converting to ISLAM! That's just "your opinion," which, of course, you're entitled to but, it's still nutz, and THAT is my opinion. Long before we are faced with that problem, one or more Muslim countries may be nuked off the face of the earth, so it's ridiculous say that we are going to have to convert to ISLAM!
Of course there is - there is a practical comparison.
The practical effect of converting to Islam is to abandon your future to Islam.
The practical effect of having minimal or no children is to abandon your future to Islam.
The process is different, but the consequence a generation from now is the same.
They won't be nuked. They blow themselves up at a rate that almost equals their birthrates. If they didn't procreate so precariously they would be extinct. Maybe we could use our Western propoganda muscle and make contraceptives popular in the Middle East,then they will become extinct.