Your post got me looking up the man on Wilki.
Frankly I don't think his Non Jewish wife is a reason to boycott the notes.
He was probably right in refusing that she convert just b/c the Rabbi asked. (Are Rabbis even allowed to do that? Ask that the wife convert just because the husband is a big poet in Eretz Israel??.....not because she believes in the Jewish docraine and wants to keep Mitzvot.)
It could be argued that Israel should be able to find some better figure to adorn their notes instead of some poet with a Non Jewish wife. The reason he is there is that is the Israeli establishment has a strange lionisation of modern Hebrew poets....as if these scribblers found a cure for cancer or were some type of hero that saved lives.
I never understood the Israeli establishment adoration of their poets. I remember when I first learnt Hebrew. The Hebrew teacher spent a whole lesson on the Poetess Rachel, another of their "Heroes". Rachel joined a Kibbutz but was thrown out because she caught TB from looking after kids, (nice places these bloody Kibbutzim, I thought, throwing out invalids, but didn't say that to my lefty teacher.)
Rachel then had an out of wedlock affair with a man before dying.
Now I ought to sympathise with her, but I can't. ...and the poems my Hebrew teacher read written by Rachel were secular things that any half talented Non Jewish person could write in English, like her poem on the pain of not having children. I don't understand the fuss round these people.
To me Jewish poetry is psalms, and perhaps to a lesser extent Ehud Manor's beautiful song about biblical Leah and Jacob put to music, yet I wouldn't lionise him and put him on a banknote.