Is the WW3 close ?

nope, not even

NO!

Within the next 25 years.

For the 76th time, NO.

I hope not

Closer than you think. And it won't be terrorists. They are just the preliminary skirmishes. Look at how WW1 was began. Nations that could have avoided it, staggered right into it. Because of the acts of a few terrorists. They called them anarchists then.