so, if we are supposed to do hishtadlus for frei yidden, then we probably should meet them where they are – and half of them are in Medinat Israel. Not sure then what “supporting medinah” mean v. other activities? None of us are voting in UN … many gedolim support voting for various reasons …
does working and paying business count as “supporting”? Maybe you consider paying taxes to “medinah” an aveira and prefer to avoid those, or allow taking their money because you will be a better judge of how to use it? I don’t see how this is different from getting into a business partnership with some frei Yidden – I presume you should respect common interest and be an honest partner, while still protecting your keeping shabbos and all. Do you have classical sources how to behave in such partnership?
Gittin 62 from another thread discusses minimizing saying shalom to non-Jews who work in EY during shemitah, maybe that can give some support to your position.