@Amun didn't say there will be a mass exodus from Europe. He said the image of Islam will get so tainted that Muslims will leave it in droves.
Western imperialism? Yes, that's part of it. The problem is that ISIS is upset with Saudi Arabia because they are not Islamic enough. The angry disenfranchised Muslim masses are angry because their leaders are not Islamic enough. That means this was inevitable and not just caused by the west. It's caused by Islam and the values those people hold.
Yes I agree that it will cause a mass exodus. The average Muslim today is so ashamed of Muhammad that they change the age of his child bride from 6 to 9, which is not much better.
I don't know how else i can explain to you other than , i understand your frustration with muslims of the 21st century we are facing huge trials and tribulation so much so that these hadihs reflect how much us muslims have started from our faith , and instead are being ruled by tyrants , we are far too weak as a collective cohort.
Ibn Omar reported that the messenger of Allah said: "People are like a hundred camels amongst whom you hardly find one fit for riding." (Agreed)
On our attitudes:
Abu Sayeed reported that the messenger of Allah said: "You shall follow the practices of those before you, inch by inch and mile by mile, to the degree that if they enter into the hole of a lizard, you will follow them." He was asked: "O messenger of Allah, are they the Jews and Christians?" He replied: "Who else?" (Agreed)
Ibn Omar reported that the messenger of Allah said: "When my nation will walk with vanity, and the sons of kings, the princes of Persia and Byzantine will serve them, Allah will give authority to the wicked over the good." (At - Tirmidhi)
On our results:
Thauban reported that the messenger of Allah said: "It is near that the nations will call one another against you just as the eaters call one another to their dishes." Somebody asked: "Is this because we will be few in numbers that day?" He said: "Nay, but that day you shall be numerous, but you will be like the foam of the sea, and Allah will take the fear of you away from your enemies and will place weakness into your hearts." Somebody asked: "What is this weakness?" He said: "The love of the world and the dislike of death." (Abu Daud)
Abu Hurairah reported that whilst the prophet, Allah blessed him and granted him peace, was talking, a Bedouin came to him and asked: "When will the hour come to pass?" He replied: "Wait for the hour when trust will be destroyed." He asked, how it would be destroyed, and he said: "Wait for the hour when the rule will be entrusted to those who don't deserve it." (Bukhari)
Anas reported that the messenger of Allah said: "The hour shall not come until time will be considered short, and a year will appear like a month, a month like a week, a week like a day, a day like an hour and an hour like a flash of fire." (Tirmidhi)
Abu Hurairah reported that the messenger of Allah said: "Hasten the good works before the advent of tribulations like pieces of dark night. A man will get up a believer in the morning and end the day as an unbeliever, or end his day a believer and get up an unbeliever next morning, selling his religion for a share of this world." (Muslim)
'Auf bin Malik reported: "I came to the Prophet, Allah blessed him and granted him peace, during the battle of Tabuk while he was in a leather tent, and he said: 'Count six things before the last hour: my death, then the conquest of Jerusalem, then the pestilence that will overtake you like the disease of cattle, then the excess of wealth, so much that when a man shall be given a hundred dinars he shall remain dissatisfied, then revolution from which not a single house in Arabia shall be spared, then a treaty between you and the Westerners (Banu Asfar - the Romans), but they shall cheat you and march against you under 80 banners with 12000 soldiers under each banner. (Bukhari)
The prophet clearly predicted how much we muslims will lose our selves in this era of tribulation , our faiths are being put to the test like never before may allah have mercy on us , truly the end is near.