Are these translations of the Sutta Nipata correct?
The quotes may be real, but their translation is probably not. 

Sanskrit (and Pali) root "ved-" stands for gnosis, knowledge, understanding. The name of Vedas comes from the same root, they are supposed to be collections of (religious) knowledge. Using this coincidence, it looks like instead of translating the words such as vedehi, vedagu etc. as e.g. having known, expert/erudite etc. - they left them untranslated and made it look as if they were referring to the Vedas.

For example in the first phrase they have quoted 


  ...Vidvā ca vedehi samecca dhammaṃ... 


probably means something like


  ...having known and having learned, thanks to encountering Dharma...


There is no way vidva and vedehi can refer to Vedas, because these are clearly verb forms, not nouns.

And so on.