Russia used the same tactic as Israel to invade.

No they didn't.
Israel used an attack on Israel from occupied territory as an excuse to do a full-scale genocide.

Russia went to Kiev to demand Zelensky to lay down arms in the Donbass,
end the civil war and allow Donbass separation from a military couped Ukraine.
If not, there Russia would continue with its special military operation
and demand all historic Russian Oblasts granted to Ukraine by Russia,
back to Russia.

it is always the same excuse for invaders create a fake eminent threat

No, one was about dealing with a terrorist threat
by attempting to genocide multiple civilizations,
the other acts accordingly after one side,
a Ukranian puppet leader
that takes direct orders from the US, where he breaks all treaties
and a US who literally tells Russia
"we're gonna do whatever we want,
place weapons wherever we want,
kill whomever we want,
break every treaty we want,
and you're not going to do anything about it,
deal with it".

"A civilization is going to die tonight"
after a country defends its own country
is what the US is all about.