system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: If Crimean citizens voted in a referendum to join Russia, why is the West against it?

Is the West afraid that Russia will try to take more of Ukraine? Does leadership think the referendum is invalid? Genuinely curious.
gpt
1. Use the search feature

2. The ballot did not contain an option for maintaining the status quo

3. This kind of referendum while under enemy occupation is illegal under international law

4. The results of the vote are incredibly suspicious

5. This referendum is illegal under Ukrainian law.