The stance of “you didn’t care about X, so you’re not allowed to care about Y” is pretty fucking dumb.

The illegal annexation of Crimea is inherently different.

• Russia had good propaganda and muddied the waters by arguing that the majority of the population wanted this.
• Ukraine did not stand a chance against the invading forces. The whole attack was finished in a month. The chances of retaking Crimea at that point were next to zero.

That was 8 years ago and the situation has changed dramatically.