People telling Warren to drop out will not
1) make Warren drop out.
2) make Warren supporters want to support whoever you're supporting.
It's not a good strategy. It was annoying in 2016 and annoying now.
Now, how are you so sure that whoever sent those messages were Bernie supporters?
Don't discount the possibility the very real possibility that it's dirty tricks by Russians or another campaign.
If you're willing to look at some of the toxic messages from anti-bernie folks,
there's a compilation here. The hate directed towards folks like Grey or Turner is insane.
It's chronological so if you want to read recent comments they're at the bottom.
People from all campaigns are very capable of being 'toxic'