To be unpopular, I don't feel particularly sorry for Julian. He didn't just "report" on the wikileaks, he helped induce them and then he picked which items to release for maximum damage. Other allegations are that he worked with Russians to do this, now if there is evidence of this, he deserves to see trial. If there isn't then I'm sure he'll be able to make a solid case in his defence. (Now a court must view someone innocent till proven guilty, but I don't have to and I'll take him running into a foreign embassy to avoid trial a good indication that he's guilty and he knows he's guilty. )
If he wants a trial here I think that would be fine and I don't think many would have any objections, but he should have to defend his actions against what amount to some of the most serious accusations that can be levelled against people.
Edit: grammar and spelling