Calling to defederate merely on the basis of political opinion might be premature. However, I suspect defederation will happen for legal reasons: they host users who openly support terrorist organizations designated as such by the EU. LW is subject to Dutch law - hosting such content is more of a gray area than CSAM, but still very much illegal in most countries.
The reason I’m not pushing here with examples is because I have not yet contacted the mods/admins to remove said content. They may have simply not been aware and I’ll give them that chance. But even seeing that content has a chilling effect on users who would contribute - even in unrelated communities.
Defederation is a tool of last resort. Before taking that step as a community we should attempt to engage the admins to align them towards more acceptable behavior. Migrating communities away from instances with petty and abusive admins is always a good idea, and this absolutely qualifies.