I’m sorry but you’re badly misinformed here. There is no concept of “primary citizenship”, you’re either a citizen or you’re not. If your government has a right to strip your citizenship, then mechanism by which you acquired citizenship is relevant. The whole point of citizenship is to declare that everyone with citizenship has identical rights and protections from their government.
There has been one person in the UK who had her citizenship revoked for joining ISIS. She was a born in UK, and was a British citizen from birth by right of decency. She is now stateless, a citizen of no country. These are the actual laws you’re defending, the hypothetical laws that only apply to naturalised citizens don’t exist, and aren’t being proposed.