Turkey began their application in 1987 and on current trajectory it wont be anytime soon.
As to whether it will push onto the Middle East and the UK ceases to become a nation, i think that is you speculating.
They are not concerns unless you have some back up links i can read to see if they are serious claims.
Turkey will happen soon. They want it and key EU leaders like Merkel want it. The recent migrant deal struck will help their cause.
On the other point here's a quote from one of the EU's founding fathers, Jean Monnet:
“Europe’s nations should be guided towards the superstate without their people understanding what is happening. This can be accomplished by successive steps, each disguised as having an economic purpose but which will irreversibly lead to federation.”