It’s not inevitable that Belarus gets directly involved, and if they do it opens a huge amount of border to defend against. It’s not a border to go across and bring battles towards the Belarus capital, but instead makes the country need much more manpower to defend than currently, which is better spent defending elsewhere and better still - attacking, and taking back land.

So it’s not a war they can push forward on initially - initially it’ll be an attempted massive push by Belarus and Russia. And if Belarus gets directly involved it will be a massive setback, thinning the Ukrainian defence, ruling out the ability to strike back, and minimising the big morale boosts when towns and cities are retaken.

The article says that Russia has no comment on this, but like every single attack on them, they will use it as an opportunity, e.g. find any non-strategic town that the two Belarusians allegedly fled to, then destroy it with barrages for two weeks.

I get the thumping of the chest, the feeling of striking back, and making the enemy power bleed. But it needs to be coordinated with official forces or it risks everything.