Sorry, but the hostility was initiated by the WMF with it's putsch against the community on deWP. The implementation of superputsch and the actions graved in stone this ways was nothing less then a declaration of war against deWP.
MV should never ever have been forced with pure might, without legitimate reasons, against the community, just because you could. Even the lifting of superputsch from the page was done with the explicit thread not to dare to implement community consensus. That's not something that generates trust.
Trust was severely destroyed by the WMF with its actions. The WMF has to do something to regain trust, this here ist mere saying, not real doing. On the horizont the next desaster after VE (completely and with full knowledge beforehand botched by WMF in its first implementation) and MV (I just descibed how it was seen by those outside the blinkered WMF ivory tower: installed with disdain for the community, explicitely with ruthless threads against two very big ones) is Flow, some half-baked forum impersonation, that mainly breaks the connection between talk pages and the wikiverse. But somehow some people in WMF-dev-circles seem to see the next messiah in it, and so the fear of the next desaster is a quite real one.
If you say clearly, that such huge projects like Flow, MV, VE will only be implemented after explicit consent by the communities in the usual community vetting process (MB, RfC, whatever it's called in the wikis), without caveats, and do so on some official policy page here, it would probably regain some lost trust towards the WMF.
WMF has done nearly everything to loose all trust in the past, it's quite easy to ask for, but quite impossible to get, if you're proven untrustful. You have to prove that you really changed your way of acting, that you really know by heart that the WMF is only a service agency for the real wikiverse, the communities.