but I doubt your report to be honest - and even if a couple of oaks were felled it doesn't really matter
Ok, you've never seen it, so maybe you don;t get what it's like. Let me tell you, from first hand experience: Bialowieza is a natural forest, which means that all the species are in mixed stands, with about 5 or 6 different species growing right in amongst each other, of many different ages and sizes. Rarely do you get more more than a couple of trees of the same species standing next to each other. So, if you want to cut down a spruce, you will also need to cut down several other trees in order to reach it. But as you can see from the photos I gave you, the logging operations are using clear felling methods: they cut all trees in a large block of several hectares, and leave a buffer of about 50 m between this and the next block. You can see the clear cutting in this report: earthisland.org/journal/index.php/elist/eListRead/europes_last_primeval_forest_brink_of_collapse/
Logging an area like that means that you take out hundreds of trees of all species - oak, hornbeam, spruce (healthy and diseased), pine, alder, limes, hazel shrubs, everything. These are the major species in the forest, most being found in all stands. Even you should be able to look at that picture and understand that not just dead spruces are being removed on a large scale. Everything is being removed, and replaced by commercial oak saplings.
Here is another clear cut, taken 9 August 2017: gettyimages.co.uk/event/bialowieza-national-park-775028778#sign-by-the-road-seen-on-august-09-2017-on-the-681-voivodeship-road-picture-id837845636
Now, you can believe what you want. All I can do is put the evidence before you.