I'm no Trump fan in the slightest (going back to the 1970s),
But 'the clap heard round the world' was rude, yet funny-ish. But still inappropriate and The State of the Union Address was not the place for it.
She was obviously trying to top that with this, and she did, because this was beyond rude, it was disgraceful.
If she's not capable of handling her position with respect and dignity regardless of her personal (and petty and vindictive) feelings, then she should be removed from it.