Well, time is just one manifestation of space in the context of Relativity. If spatial separations are an illusion, than so are temporal, but if temporal are real, then so are spatial. In Relativistic terms, time and space are a package deal if you’re to look at things from a vantage point not restricted to a single frame of reference.

I was trying to be 'clever' — I didn't actually mean locality is literally an illusion, only metaphorically. But yes, you're correct that time and space are the same thing when you get down to things. Be more accurate to describe causality as excitations that permeate at a set velocity [i.e. c]. Locality is just the progression of these excitations. Additionally, any field that interacts with the Higg's field experience a kind of 'inertia' (i.e. mass), which causes any excitation it may have to permeate at a velocity less than c. I will admit that I do not understand why this is. All I do know is that it has to do with the property spin (which, ironically, doesn't have anything to do with an actual rotation). The maths are beyond me.And don't even get me started on Space-time. Seriously, don't. Trying to understand space-time in the terms of QFT has been the holy grail of physics for decades. So if the top scientists can't figure out how it fits into quantum fields, then there is no way we would be able to.