Why would they be? Russia doesn't tend to fund leftist groups. If they're actually a leftist group, it's far more likely to be about Palestine and of their own

Why would they be? Russia doesn't tend to fund leftist groups. If they're actually a leftist group, it's far more likely to be about Palestine and of their own accord, or because of direct government oppression against them. Last time I knew of an attack like this in Berlin, it was a direct retaliation after the government attacked their house with military tanks.