Do you expect Putin to invade Tajikistan and do a regime change there? Or cut all their food and water (for a while)? So far he hasn't threatened to do that. And for good reason, the gov't of Tajikistan (unlike that of Gaza being Hamas) wasn't backing the ISIS-K boyos, even if their surveillance of a family who already had one son die in Syria was suboptimal.
Also, the BBC comments/reports:
Soon after the Moscow attack, several Russian MPs called for the tightening of migrant laws. One suggested migrants should be expelled from Russia "for the slightest offence".
But there is no realistic chance of that happening as Russia benefits from Central Asian migrants too. The war in Ukraine has left Russia facing labour shortages and it would simply be unable to afford losing millions of workers.
Besides, Israel is considered by and large part of the West. So appeals from Western leaders are more likely to be taken into account there. Russia's leadership is already considered mostly 'beyond reason' by Western leaders, and so is increasingly its broader culture. The Western media showed the brutality metted to the 4 Tajiks and shrugged at the [unflinchingly approving] Russian TV response/commentary. (Given reports of how Russia treats Ukrainian prisoners, few had any different expectations at this point.)
To say nothing that the West is being a bit busy fighting the Kremlin propaganda claiming that this was a West-orchestrated operation. More precisely theythe Russians claim the US, the UK, and Ukraine were behind the Islamists. (US intel agencies at least were busy telling (Western) journalists that they had in fact specifically mentioned Crocus in the list of potential targets given in their warning to the Russian services before the attack, contradicting Naryshkin's claim that the US warnings had been "too general" to be actionable.)
FWTW, even Medvedev who talked up nukes and missiles from the sky (against ICC) in the past, made a conditional statement here:
Putin lieutenant Dmitry Medvedev declared that if Ukrainian involvement is proven, Moscow should respond by deploying hit men to kill the country’s leaders “in Kyiv or any other convenient place.”
As for the Arab world response to Hamas vs ISIS. The latter is much more universally reviled. As you mentioned Egypt, they had their own war in the Sinai against the ISIS branch there, which included a large loss of life in one event--some 300 people in a mosque. (It remains controversial if ISIS also brought down a plane there, or if they claimed responsibility for an accident; Egyptian courts and Russian investigators disagreed on the cause.) Hamas actually helped Egypt there a bit, as they could not stand competition, so killed any who declared allegiance to ISIS on their side of the fence. (FWTW, ISIS also 'declared war' on Hamas.)