Wow, I'm shocked that came from an orthodox priest. Tbh all the orthodox I meet are pretty anti-Zionist, I'm not sure if he's an exception or the rule but either way what purpose does a priest have to advocate on political matters? I mean really.. How is a political decision of boycotting Israel (a secular state, by no means constitutionally religious or christian for that matter) somehow dividing the body of Christ (spiritual body of christian saints)?
Personal opinions don't divide the correct dogma, doctrine, belief, liturgy, etc which characterises what the church (body of Christ) is.
Personally, I'm not crazy about Israel foreign policy or the treatment of Palestinians, I think it's deplorable actually. It is true that it is the most secular and the country most like the west in the Middle East. Not that west is a beacon of morality or anything, but in terms of quality if life, democracy, freedom of expression, etc, sure.