Collective punishment is a warcrime. Forceful placement of a population in regards to occupied territories is a warcrime. The deliberate destruction of civilian infrastructure (schools, hospitals, airports, bridges, etc) is a warcrime. Israel is guilty of all of the above, and then some. So yes, they ARE violating the Geneva Conventions, and as such, they ARE guilty of warcrimes. Nothing you say or do will change this fact.
British Airways flight diverted to Canada after bomb threat (AP)
from the article: Fear of arrest still prevents Israeli officials from visiting Britain