1. Well there is a plan to conquer western countries by immigration and high birth rates. A document was found from TMB and went to court in Texas. It was ruled to not violate our law. There is an English copy out there somewhere, you can search for it if you want to know the truth (though I doubt it).
https://www.investigativeproject.org/documents/misc/20.pdf
*Edit: Because I'm feeling generous.
http://www.centerforsecuritypolicy....rchives-of-the-muslim-brotherhood-in-america/
2. You're making the assumption that a people wanting to conquer the west by means of high birth rates and immigration would follow the same population trends as westerners.
This assumption will prove to be false in due time, given polygamy and the nature of exponential functions. I'd bank on it.
Besides, only 75 Million more Turks are allowed to be resettled. Yeah it'll drain Turkey, but they are replacing Turkey with more Syrians so it's OK.

You guys can handle 75 Million more right? Government will pay for them all
Only 73% of them support an Islamic theocracy, I'm sure you'll be fine.
3. I would send you links, but I think they are banned in your country. You guys are pretty much living in the equivalent of North Korea, you know that right?
http://www.dangerandplay.com/2016/01/29/sweden-caught-censoring-the-internet-1984-style/
http://www1.cbn.com/cbnnews/world/2014/April/Soviet-Sweden-Model-Nation-Sliding-to-Third-World
Even more interesting, a U.N. report expects you guys to be 3rd world nation below Lybia in 15 years.
http://ww.rrojasdatabank.info/HDRP_2010_40.pdf
4. You've got it wrong. We are looking forward 50 years and applying basic mathematics. We should favor the future of our children over some migrants.
And whether you look back or not, I assume if your land is conquered (even peacefully as outlined in that Muslim Brotherhood document), your children will wonder "what the fuck were these idiots thinking?"
5. You are assuming the numbers of Islamic extremists will remain the same. Exponential functions bro. Exponential.
Also, just because someone isn't committing terrorist attacks doesn't mean they don't want to replace your culture with a theocracy.
Time will tell. Call us racists or facists all you want, and in 50 years if you're right and we built the wall for nothing... oh well, call us stupid. And if we are right and you are wrong, I'll be sure to tell Prime Minister Mohammed, "I tried to tell them".
We know year by year what's going to happen, and they know that we know. It's only you that they tell tall tales to, and you buy it, and spread it to the citizens of your countries. You people in turn do not feel a sense of the impending danger - this is what worries me. How do you not understand that the world is being pulled in an irreversible direction? While they pretend that nothing is going on. I don't know how to get through to you anymore. - Putin
I understand what Putin's feeling here. It's like I'm wasting my time. You don't want to hear it. You don't want it to be true. Whether it is true or not is irrelevant. You'll just have to see for yourself.