The death rate of Iceland is 0.5% of those tested, in the UK its nearly 1.5% that in itself should already be ringing alarm bells to using it as a piece of evidence to support your point of view.
You cannot take one simple piece of data in a highly complex situation and announce Eureka, we have the answer. I am sorry, and respectfully, but that is just plain dumb. Not worth discussing further.
There a variety of factors that need to be taken into account, and they include population density. Number of social contacts and their type. Age groups. Pre-existing conditions. etc.
For instance, I would wager a small sum that the UK has more people affected by pollution in the UK, due to out Island being tightly packed in many places. This results in an excess number of conditions such as asthma amongst others. I would also say that generally the UK would have a higher proportion of people who were obese, and therefore either suffering with multiple health conditions such as diabetes, cardiovascular disease etc. If you want to compare groups of people, i.e., UK to Iceland, then you need to compare apples for apples to ensure you do not get misleading information.
For instance, some of the highest density of cases in the UK are in Barrow and Furnace and parts of remote Scotland. So that, just using a per capita argument would blow out of the water your general assumption.
In addition, unless I have miss understood, the BMA has today dropped its support of the Teachers stance and saying that there is not an increased risk to Teachers from Children. And finally, Denmark has undergone a controlled reopening of schools with no spike.
So, there are no guarantees. Good or bad. Lots of conflicting information and lots of people on the internet peddling unsound and unproven assumptions as facts.
There's no need for people to get angry with each other over this. But people need to think through what they are saying and what they are using to justify their position. It needs to be rational and need supportable with solid foundation in facts, not suppositions. The internet has a lot to answer for.
If anyone wants to blame anyone for the perceived unavoidable deaths then I suggest you start first with the media who have behaved despicably, jumping on an excuse for a shock headline or to catch out a politician. You then want to blame the politicians for seizing on any and every opportunity for cheap point scoring and self promotion. If the media and the opposition parties had actually put the country and her citizens first, rather than their own self promotion and interest, I predict we would be in a much better position all around.