Russia (I assume this is what you mean) didn’t go “alt right”. They likely spend a lot of resources encouraging right wing politics in all countries they benefit from weakening the stability of. It’s no surprise they had a hand in helping Trump, brexit, Bolsonaro, NRA. Just look at who they supported in a massive disinformation campaign in Poland, a leader of the ultra-nationalist, neo-fascist “All-Polish Youth”.
To anyone in general, not OP: inb4 any whataboutuism about US meddling in the world. It’s a separate matter. Two things can be shit at the same time.