This is a consequence of over-engagement, not under-engagement. After MH17 and how he tried to kill Skirpal he should have been ostracised then, not led to believe there was nothing he would do that could ever result in facing consequences.
Instead we continued to pretend it was just Vlad, he doesn’t mean it really, what a crazy guy etc etc. If we don’t change our politics the people he’s compromised, or the useful idiots such as yourself, will no doubt pipe up a few weeks / months after this ends and start claiming it’s time we engage with him properly now.
We should treat him as the enemy he is until he, and his regime, are gone. Anyone associated with him, who has taken his money or facilitated his rise (politicians, journalists, lawyers, financial services types) needs to be at best looked at properly and probably removed for now so that they aren’t in a position to help him in the future.