Because he has given a voice to the silent majority..... the good people of America who work and pay taxes and give to charity and try to raise good kids... but have been abused by the system by way of the theft or our wealth and liberty. They've held us hostage by seizing the narrative and defining words to tear us down and keep us oppressed. They've poisoned every institution from higher learning to K thru 12. The paint us as a bunch of dumb redneck hillbillies who don't understand how the world works. They steal from us thru excessive taxation and regulatory laws. The republican party who is supposed to represent us gives the progressive left wing of the democratic party virtually everything they want. Thats pretty much about it in a condensed version.
From what you say and from what we see on the news you do have problems. Our political system is very different from yours so its difficult to compare the two. Although we have two main party's Conservative and Labour they are roughly the equivalent to the Republicans and Democrats. We also have a third party called the Liberal Democrats which are not Liberal as you use the term. They are what might be called Centerest. They formed a coalition with the conservatives
for five years because no party had an outright majority in Parliament. It was the first time they had any power since
the start of the twentieth century. Last year they were almost wiped out and now we have a Conservative government.
We also have regional Parliaments in Scotland,Wales and Northern Ireland.
The Syrian crises in Europe has had little effect on us here. The UK has concentrated on giving aid to those still in the middle East. Most of our immigrants are from Eastern Europe. We have an established Moslem population here mainly from Pakistan and Bangladesh, they form a comparatively small minority of the population.