I for one strongly support the EU, and I'll set out my main arguments here :
IMMIGRATION
As I've previously said on this subject,
Is immigration an entirely positive thing? No.
Did we have mass immigration before the EU? Yes. Irish, Jewish, West Indian, indian, Pakistani, Australian and many more have come in very large numbers at various points of recent history
Will immigration stop if we leave the EU? No. Of course not. People have always come here in large numbers and always will
In addition to that, i would point out that it's a myth that the UK has more EU immigrants than other countries. Germany, Sweden and France all have more than the UK.
BRITS LIVING ABROAD
There are around 2 million Brits living in other EU countries, including nearly 1 million in Spain. Freedom of movement works both ways
ECONOMY
Being in the EU is hugely important for the UK economy. Particularly for companies who export and for the financial services industry in London.
SCOTLAND AND THE FUTURE OF THE UK
If you want to live in a nightmarish, right wing micro-state, then by all means vote to leave the EU. A vote to leave would almost certainly trigger a second Scottish independence vote and I'm guessing it would be yes to independence this time. A Tory infested Little England, out of Europe and separated from a pro-Europe Scotland? Just dreadful.
Finally, please remember how the EU came about. Eighty million people died in world wars one and two. Eighty f***ing million people. Now, just seventy years later we can live as equals in each others' countries. Its amazing. An amazing, wonderful thing. Don't throw it away over petty small minded nationalism.
SUPPORT THE EU!