Among other clients his company lobbied for, yes, possibly so
That’s what lobbyists do
Represent their clients’ interests to political leaders to try to affect policy
In this case, The interests of Russian- speaking Ukrainians who were alarmed by far right Ukrainian thugs, suspected discriminated against mistreated and worse by UKraine Russophobes, . did NOT want UKraine to become part of the EU or NATO, and wanted to have closer ties with Russia to protect their interests
Using your logic if Mexicans in the USA wanted to be closer to Mexico they’d be right to have that nation attack us. Hitler and the Sudetenland Germans were right to dismantle Czech-Slovakia with threats of war. And the attacks on Poland made sense because of the Germans in Gdansk.