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.