Mi scuzi? This hardly makes sense in some areas.
-Problems:
Capability Lack: What are they lacking? You failed to mention that.
Human-like->DNA: For DNA you have 4 bases: G,C,A,T. In RNA strands you have G,C,A,U. For RNA you have 33 amino acids. Some acids have more than one codon, while others are start or stop codons. Any other change within these structures are gonna be fail codons. Now, if these things did NOT have any human bases, do say so.
Moar DNA Shit: Immune to bio-weaponry for the homo-sapien variety? If these things are human like, I'm assuming they have the DNA/RNA bases listed above. If not, again, say so. Another thing, bio weapons hit "carbon based" beings, regardless DNA/RNA structure. I'm assuming what you mean is they attack carbon based beings with the DNA bases of A,C,T,G. Which really goes specifically into more genetics and other micro-sciences like that.
Xenophobia you say?: What are the exceptions?
MindReading: If we can't read your mind, does that mean you can't read ours?
Poison Purge: Then there's no need to to have an organ/gland to excrete these said poisons from the body? Dogs have a gland that is squeezed to let out toxins stored in the body. Humans have the joke finger. The Appendix stores toxins in the body. The only benefit I see from the ability to expel said toxins is that if the organ explodes(if there is one), then you might not need to go to a medical facility asap.