Discussed here in 2014:

https://news.ycombinator.com/item?id=7831025

I personally agree with skywhopper’s comment then:

https://news.ycombinator.com/item?id=7832893

"The president is the sole representative and spokesperson of the states" can bypass the entrenched clause.

But something obvious the senate can block is not it. An amendment that gives the presidemt power to suspend congress during a national crisis or for national securitu will do the trick too, it is a bit obvious but people might be ok with it if a crisis or war is big enough. The only thing preventing a dictatorship is the senate who serve longer terms than the president. Being able to suspend the senate (the VP had a role!?) without an amendment is even more powerful if the majority party is for the dictatorship. General elections can be delayed indefinetly.

Regarding protections against discrimination of name or language: how can institutions comply and still enact partiality to, say, account identification for purposes of their service?

TLDR

We don't know the loophole. We can only guess.

If we alter the Constitution to make it easier to alter the Constitution then it could become a runaway problem, leading to dictatorship.