OP - I am not going to be rude to you, even though it would be quite easy to do so...
Firstly, as other people have pointed out, do you actually know any of the other policy lines of UKIP? Everyone focuses on immigration, but they AREN'T a one issue party anymore. Even if you might agree with their stance on immigration, please please do look into their stance on other issues. I personally would not want to live in a country run by a party employing people who make horrifically homophobic statements. Who make disgusting statements about women and rape. You say your brother is gay - how would you like him to have to live in a society run by people who would, quite literally, consider him abhorrent?
Secondly, you may wish to read some background information about the party. When UKIP was first established (by a different man) it had a clause in all the registration forms which specifically stated that it was NOT a racist party, that they had no issue with people of different ethnicities, and that you had to basically sign a form to say you weren't a racist fuck. That sounds like a pretty reasonable way to ensure that you don't attract a bunch of racist nationalists doesn't it? One of the first things Farage did was scrap it.
Why would he need to do this? What possible motive could there be for getting rid of it?
Thirdly, UKIP wouldn't even be able to do about half of what they are suggesting. NOT unless they would be happy to completely isolate themselves from the rest of the developed worlds.
All that stuff about refugees? Yes, we could do less for refugees and still abide by the convention. But we would never just be able to deport people without processing their claim. How would we deport them anyway if we don't have any travel documentation for them? Where would we send them??? Basically they'd have to work out a way around this (which considering the IQ's of the people inside the party is unlikely) or just leave the Convention of Human Rights.
Then we'd have the UN to deal with. Or maybe we'd just leave the UN and no longer have any say in massive, massive amounts of international law (that we would have to abide with if we wanted to, you know, trade).
So we stop EU immigrants coming in. That works both ways. We isolate ourselves hugely again, from any of the law coming out of the EU, which, AGAIN, we would still have to follow if we wanted to trade.
There are countries on the continent like Turkey that have to implement huge amounts of legislation they get absolutely no say in.