If you actually look at the quoted report (I don't have a link so just the bit Al quoted)
Labour Party members.....
Presumably this does not mean "all members" so it must mean "some members" which could mean anything from 2 members to 99% of the membership. Vague to the point of not being useful.
Labour Party members want to sack the Queen, abolish Britain’s borders and the nuclear deterrent, and support a general strike to bring down the government.
I agree with getting rid of the Queen, I agree with getting rid of Britain's borders (as in we should join Schengen) and does the "general strike to bring to government down" refer to a general strike or bringing the government down (ending Conservative dictatorship has got to be a good idea though in some respects Johnson has already ended any Parliamentary power by closing it down).
.....Most of the 1,100 members surveyed by YouGov believe the antisemitism crisis that has ripped the party apart is mostly the fault of the media or Jeremy Corbyn’s opponents.....
Assuming they are referring to the antisemitism in the Labour Party and not in the country as a whole, there is a good argument that it [the crisis] is caused by Corbyn. Not that Corbyn has caused any antisemitism but rather it is only a crisis because Labour has been so ineffectual is sorting the issues out and Corbyn seems to have been prime mover in being vague, evasive, avoiding, etc. (plus he's leader and should maybe have learnt to lead by now).
Just 15% are “proud” of Britain’s history, with 43% saying they are “ashamed”. Only 29% believe in retaining the monarchy, while 62% say that Britain should become a republic.
Britain's history is a pretty bit thing to hold a single opinion about. There are certainly some pretty significant aspects to Britain's past that I'm "ashamed" about (including recent history). And what is so scandalous about wanting the UK to be a republic - I want that and I don't regard myself as an extremist.
BUT I am absolutely sure that ask a set of daft questions to Conservative Party membership and you'd get a set of much dafter answers (just look at who they recently voted to be PM - got to be an indication ...)
ps I don't think I understand enough about NI background and history to make any argument about the poll results about the causes of the troubles - but how relevant that is depends as to it being a view held by 2 members or 99% of the membership.