I think what the senior developers react to here isn't the particular choice. You could have written "Vim is preferred" and people would still think: "Do they want me to write with my left or right hand or do they want me to get the job done".

Anyway, best of luck Marco!

If they work with the tool X, I think it is right to ask for knowledge of tool X. They're not hiring for working alone, but in a team. BTW, Pula is a great natural place in Sardinia, worth the work :D P.S. best of luck to Marco, from which I've learned Zope, Python and ... IDE integration :-)