Oh and about that europe wide coalition of his: I understood that more as some way to collaborate in the European Parliament to sabotage the effectiveness of European regulation - something rather like your republican House Reps, I believe? (sorry ‘bout that ;) ).
Those parties tend to be quite nationalistic, they don’t like “brussels” taking over from national legislatures (and if there was a decent way to argue that equivalent of states’ rights around here at least they might be interesting to argue with, but sadly, not the case…) and therefore want to limit EU influence on the national level.They also have in common a desire to limit immigration substantially.
Those are two grounds on which they can work together, at least.
TBH: I think Wilders is mostly just gunning for any way to keep relevance and political momentum. He might have some unsavoury supporters who support him mainly for lack of someone more extreme (but can you blame him for that? they’ll vote for the guy they least disagree with, blaming a politician for who votes for him gets extremely problematic IMO). So yes, he’ll ally with anyone who shares those two basic goals.

As for pure, unbridled racism: there’s actually not nearly as much “he’s got the wrong skin colour” type racism as some of you guys seem to think around here. Actually, I don’t think more than a few thousand Dutch folk under, say 60 or so, would still find that even remotely acceptable. Even allusions thereto basically fall outside the overton window in most political discourse (of course discount a few very, very loud voices - but you get that everywhere). What is quite prevalent is a distrust of ‘cultural’ differences.
It’s not really been inside the overton window to debate ‘acceptable’ cultural norms (for example, wearing what you want is obviously allowed, FGM certainly isn’t, but what about parents forcing kids into certain cultural norms? to what degree are arranged marriages permissible and when do they entail too much of a risk on involuntary participation under duress? that sort of stuff for starters), which changed maybe 10-12 years ago (I’d say a short while before 9/11; while it might’ve overcharged the debate quite a bit it’s not a cause or anything!), so that debate is now ongoing.
Of course there’s going to be outliers, but even the PVV, populist and black-and-white as much of their blathering might be, generally stays within certain boundaries.

If I were really snarky I might say that any nation producing such nice not-at-all-racist folk like quite a few GoP members of Congress should watch their tone - we don’t come anywhere close.

There might be the occasional uproar which gets published internationally but what you don’t catch along with that is how much even the PVV crowd themselves tend to police most statements which really go over the line.

You know, I’d rather not have to deal with the bunch of idiots in parliament but they’re not as bad as some international press folk seem to like to make it out to be.