Wow. This is the Olympic level of jumping to conclusions and simplifications.
Half of the Gazan population was born after the last elections were held. So they are hardly personally responsible for the situation the were born into.
There was a time in past, where some Israel officials supported Hamas to create political divide in Palestine.
In the same time Israel definitely isn't the only one responsible for situation in Gaza, many powers in the region (islamic, anti Israel) prefer unstable Gaza and troubled people as a leverage against Israel over improving the situation of the people there, so they support Hamas and the military tendencies.