@calher To help you out a little, because it does not seem to getting
through, that fellow's image you use for an avantar says to pick the ethical
choice over the convenient choice. While certainly convenience may be easy in
the short term, in the long term it does more damage.
If that fellow is not convincing enough for you, then maybe this fellow will
help too:
https://www.theguardian.com/world/2013/may/08/stephen-hawking-israel-academic-boycott
Some reading to educate yourself:
https://en.wikipedia.org/wiki/Palestine_%28comics%29
https://en.wikipedia.org/wiki/Pity_the_Nation
https://en.wikipedia.org/wiki/The_Great_War_for_civilisation
