Silly. First of all: There is no such country as "Palestine" - so how can there be an occupation of it?Who do you reckon is the biggest threat to British national security, Palestine or Israel?.
As far as i know Hamas are a regional militant group fighting against foreign occupation of their country.
Israel on the other hand has destabilised the entire middle east and caused massive loss of life in other countries in the region.
This has caused a rise in and direct threat to British interests at home and abroad.
Second: As I already explained [which seems to have gone sailing over your head], The "Palestinians" who were considered Syrians under the Ottomans. Lived in between the Jordan and the sea, in scattered groupings as did jews, on sparsely populated, dry as a bone, poor land 'owned' by absentee sheiks quite happy to sell thousands of dunams to people like Rothschild etc.
'Palestinians' in 1947, were offered a full state next to a Jewish state. They turned that down and, with their Arab allies, started a major war and invaded Israel. They've been offered a state on hmany occasions, with Israel making generous offers to secure peace, and have turned down flat every one of them. They were given Gaza in 2005 by Israel and proceeded to turn it into a terror state where women are oppressed, homosexuals murdered, and wars started by rocket fire into Israeli civilian sites.
There's never been a state of Palestine in history, but there have been several Jewish states on the land. Today, both Hamas and the PA declare that Israel must be eliminated and replaced by a Greater Palestine (which would collapse in a civil war within minutes of its creation). The "Palestinians" have a right to a state, but they have no right to claim there was never a Jewish presence, or to call for the genocide of all Jews in Israel, or to fight wars designed to wipe out their enemy.
Lastly: muslims need no excuses for their "support for Islamic fundamentalism". Hatred of Jews is stitched into the very thinking of muslims from birth, it always has been. You might be aware [though I doubt it] of the vile Qur'anic passages describing Jews as the sons of apes and pigs - for example. Or Children just out of nappies being taught to hate and kill Jews - as part of their nursery, school & university world?
Or how in the WB and Gaza, there are regular festivities when 'martyrs' detonate themselves in Israel and kill large numbers of innocent Israel civilians. The PA names football fields after 'martyrs', there are posters on the streets proclaiming the 'martyrs' as heroes and heroines of the Resistance. Mothers dance and sing on hearing their sons or daughters have died while taking Jewish lives. So please don't be sanctimonious about this - you really aren't informed enough to try.
If you disagree, then I'd like to know what your make of the islamic fard 'ayn?