What goes on in lemmy.ml should in my view not be a concern for feddit.uk as a community, unless they start somehow substantially interfering with this instance in a concerted and prolonged way. A few individuals here and there commenting and being the twats they are does not count.
Feddit.uk members can already disengage from communities and instances they don’t like or are offended by, and create new communities where they see a need. For me these are sufficient remedies for all but very exceptional circumstances. I understand that it may be hard to get a new community going, but them are the breaks (to quote a twat I despise with a passion).
Personally I find a level of perverse entertainment in reading some of the tankie discussion, in a similar way I found Trump being the US President and Boris being the UK Prime Minister having definite entertainment value. Macabre, perhaps, but we all have our kinks.
I would recommend focusing on pink drinks, ideally with a tiny umbrella. The locals will be delighted if you buy a round of pink ones. The more deprived the area, the more a round of pink ones will brighten up their day, especially so if there are bikers around.