A lot of the resentment towards Eastern Europeans has to do with the fact that "we" didn't invite them in, "Europe" foisted them upon us.
Debatable - the Queen has publicly intervened once and survived it. Supposedly she put the screws to Gordon Brown in 210, telling him if he didn't step aside and allow the LibCon Coalition she'd dissolve Parliament and call fresh elections.As with other things, for the monarch to genuinely block a populist leader or government in some capacity they would have to sacrifice themselves in the process.
No proof, though, of course.
More than last year - but still about half the size the army needs to be to contribute effectively to NATO and Germany's own defence. At the same time you're integrating the Dutch, Romanian and Czech armies into your own, increasing the area you are required to cover.